Zero Day Initiative

Welcome to our monthly look at Apple security patches. This release shows that Apple is not immune to the bug apocalypse that is impacting other vendors. Last month, they released 37 unique CVEs compare to this month’s 210. Quite a jump.

For July 2026, Apple released 210 unique CVEs across iOS/iPadOS 26.6, macOS Tahoe 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, tvOS 26.6, watchOS 26.6, visionOS 26.6, and Safari 26.6. Since Apple doesn’t provide CVSS scores or other severity information, we’re left to speculate on which of these bugs is the most severe. However, there are a couple that stand out.

·      CVE-2026-43818 (ImageIO) – This bug could allow the “Processing [of] a maliciously crafted image may lead to arbitrary code execution." ImageIO is the classic zero-/one-click remote surface on Apple platforms (images auto-parsed in Messages, previews, notifications), so this is the highest real-world remote-exploitation risk in the release. It’s also present across iOS and all macOS versions. Depending on delivery path, this is the one most likely to be weaponized into a remote foothold.

·      CVE-2026-64747 (AVEVideoEncoder) – According to Apple, “An app may be able to execute arbitrary code with kernel privileges.” Kernel-level code execution is the maximum-impact outcome on an Apple device: full compromise, defeats the sandbox and most mitigations. It's also unusually broad, shipping to iOS/iPadOS, all three macOS versions, tvOS, watchOS, and visionOS. Local-app precondition is its only limiter, and it's exactly the second stage a remote bug chains into.

·      CVE-2026-64767 (afpfs) – In this case, “A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.” This bug is a network-reachable, apparently unauthenticated path to kernel memory corruption via Apple Filing Protocol. Remote plus kernel is a dangerous combination.  Also, the “remote attacker” versus “remote user” wording suggests no authentication required. This bug affects macOS only, which is the only reason it sits at #3 rather than higher.

Honorable mentions: CVE-2026-43776 (AppleDouble) and the SceneKit set (CVE-2026-64763/64/65/66) are additional file-parsing paths to arbitrary code execution. CVE-2026-43750 (Wi‑Fi) allows code execution out of the sandbox with elevated privileges. And finally, CVE-2026-64696 (SMB) / CVE-2026-43810 (Kernel) are further remote kernel-corruption bugs.

Here’s the full table of Apple patches and the products they affect:

Apple Security Updates — July 27, 2026 210Total CVEs 9Code Execution 26Elevation of Privilege 11Sandbox Escape 9Security Feature Bypass 15Memory Corruption 55Information Disclosure 2Spoofing / UI 75Denial of Service 8Other Apple security release — July 27, 2026 (iOS/iPadOS 26.6, macOS Tahoe 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, tvOS 26.6, watchOS 26.6, visionOS 26.6, Safari 26.6). "Yes/No" indicates whether each update is affected. CVE IDs link to NVD. CVE ID Component Impact iOS / iPadOS 26.6 macOS Tahoe 26.6 macOS Sequoia 15.7.8 macOS Sonoma 14.8.8 tvOS 26.6 watchOS 26.6 visionOS 26.6 Safari 26.6 CVE-2026-64732 Accessibility An attacker with physical access may be able to access sensitive user data during iPhone Mirroring YesNoNoNoNoNoNoNo CVE-2026-43749 Accounts An app may be able to gain root privileges NoYesYesYesNoNoNoNo CVE-2026-43819 Accounts An app may be able to access sensitive user data NoYesNoNoNoNoNoNo CVE-2026-64733 Accounts Framework An app may be able to fingerprint the user YesYesNoNoYesYesYesNo CVE-2026-64767 afpfs A remote attacker may be able to cause unexpected system termination or corrupt kernel memory NoYesYesYesNoNoNoNo CVE-2026-23918 apache A remote attacker may be able to cause a denial-of-service NoYesYesYesNoNoNoNo CVE-2026-64695 APFS A remote user may be able to cause unexpected system termination or corrupt kernel memory NoYesYesYesNoNoNoNo CVE-2026-43801 App Store An app may be able to access sensitive user data YesYesYesYesYesYesYesNo CVE-2026-43781 Apple Account An app may be able to access sensitive user data NoYesYesYesNoNoNoNo CVE-2026-64737 Apple Account A malicious app may be able to break out of its sandbox NoYesYesYesNoNoNoNo CVE-2026-28928 Apple Neural Engine An app may be able to cause unexpected system termination YesYesNoNoYesYesNoNo CVE-2026-43748 Apple Neural Engine An app may be able to cause unexpected system termination NoYesYesNoNoNoNoNo CVE-2026-43776 AppleDouble Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution YesYesYesNoNoNoNoNo CVE-2026-43681 AppleRAID A local user may be able to read kernel memory NoYesYesYesNoNoNoNo CVE-2026-43672 Assets A malicious application may be able to bypass Privacy preferences NoYesYesYesNoNoNoNo CVE-2026-43763 ATS An app may be able to read files outside of its sandbox NoYesYesYesNoNoNoNo CVE-2026-64702 Audio An app may be able to break out of its sandbox NoYesYesYesNoNoNoNo CVE-2026-64725 Audio An app may be able to cause a denial-of-service YesYesYesYesYesYesYesNo CVE-2026-43730 AuthKit An app may be able to fingerprint the user YesYesNoNoYesYesYesNo CVE-2026-64747 AVEVideoEncoder An app may be able to execute arbitrary code with kernel privileges YesYesYesYesYesYesYesNo CVE-2026-64762 AVEVideoEncoder An app may be able to cause unexpected system termination NoYesYesYesNoNoNoNo CVE-2026-64707 BackgroundAssets An app may be able to delete files for which it does not have permission YesYesYesYesNoNoYesNo CVE-2026-28849 BOM A maliciously crafted ZIP archive may bypass Gatekeeper checks NoNoYesYesNoNoNoNo CVE-2026-43811 Books An app may be able to modify protected parts of the file system YesNoNoNoNoNoNoNo CVE-2026-64698 cd9660 An app may be able to cause unexpected system termination or read kernel memory NoYesYesYesNoNoNoNo CVE-2026-43813 CloudAttestation A maliciously crafted app may be able to bypass code signing enforcement YesYesNoNoYesYesYesNo CVE-2026-43797 Contacts An app may be able to access information about a user's contacts YesYesNoNoNoNoNoNo CVE-2026-64734 Contacts Processing a maliciously crafted contact may leak sensitive data YesYesYesYesNoYesYesNo CVE-2026-64746 Contacts An app may be able to add contacts without user authorization YesYesNoNoNoYesYesNo CVE-2026-43756 Control Center An app may be able to access user-sensitive data NoYesYesYesNoNoNoNo CVE-2026-43693 Core Services An app may be able to gain root privileges NoYesYesYesNoNoNoNo CVE-2026-43673 CoreAudio Processing a maliciously crafted audio file may corrupt process memory YesYesYesYesYesYesYesNo CVE-2026-43744 CoreAudio Processing an audio stream in a maliciously crafted media file may terminate the process YesYesYesYesYesYesYesNo CVE-2026-43803 CoreAudio A remote attacker may be able to cause unexpected system termination YesYesYesYesYesYesYesNo CVE-2026-43711 CoreMedia Processing a maliciously crafted video file may lead to unexpected app termination YesYesYesYesYesYesYesNo CVE-2026-43759 CoreMedia An app may be able to access sensitive user data NoYesNoNoNoYesNoNo CVE-2026-43775 CoreMedia An app may be able to access sensitive user data NoYesYesNoNoNoNoNo CVE-2026-28936 CoreServices Processing a maliciously crafted file may lead to unexpected app termination NoNoYesYesNoNoNoNo CVE-2026-43738 CoreUI Processing a maliciously crafted asset catalog may result in disclosure of process memory NoNoYesYesNoNoNoNo CVE-2026-43802 CoreVideo An app may be able to cause unexpected system termination NoYesYesYesNoNoNoNo CVE-2026-64710 Crash Reporter An app may be able to leak sensitive user information NoYesYesYesNoNoNoNo CVE-2026-39875 CUPS A malicious app may be able to gain root privileges NoYesYesYesNoNoNoNo CVE-2026-43698 CUPS An app may be able to gain root privileges NoNoYesYesNoNoNoNo CVE-2026-3783 curl Authentication credentials may be sent to a server on another origin YesYesYesYesYesYesNoNo CVE-2026-3784 curl Authentication credentials may be sent to a server on another origin YesYesYesYesYesYesNoNo CVE-2026-43758 Data Detectors UI An app may be able to access sensitive user data NoYesYesYesNoYesNoNo CVE-2026-64708 DesktopServices An app may bypass Gatekeeper checks NoYesYesYesNoNoNoNo CVE-2026-28926 Disk Images An app may be able to elevate privileges NoNoYesYesNoNoNoNo CVE-2026-28945 Disk Images An app may be able to bypass network restrictions NoYesYesYesNoNoNoNo CVE-2026-43747 Disk Images Parsing a maliciously crafted file may lead to an unexpected app termination NoYesYesYesNoNoNoNo CVE-2026-64694 Disk Images An app may be able to cause unexpected system termination NoYesYesYesNoNoNoNo CVE-2026-64776 Disk Images An app may be able to disclose kernel memory NoYesYesYesNoNoNoNo CVE-2026-43753 DriverKit An attacker with physical access to a locked device may be able to view sensitive user information YesYesYesYesNoNoNoNo CVE-2026-43793 DriverKit An app may be able to cause unexpected system termination NoYesYesYesNoNoNoNo CVE-2026-43714 Foundation A malicious app may be able to access protected user data YesYesYesYesNoYesYesNo CVE-2026-64742 FrontBoard An app may be able to access sensitive user data YesNoNoNoYesYesYesNo CVE-2026-43796 Game Center An app may be able to access sensitive user data YesYesYesYesYesYesYesNo CVE-2026-64740 Game Center A malicious app may be able to break out of its sandbox YesYesYesYesYesNoNoNo CVE-2026-64691 GPU Drivers An app may be able to cause unexpected system termination NoYesNoNoNoNoNoNo CVE-2026-64692 Heimdal An app may be able to cause a denial-of-service YesYesYesYesYesYesYesNo CVE-2026-28981 HFS Processing a maliciously crafted image may lead to arbitrary code execution NoYesYesYesNoNoNoNo CVE-2026-43682 HFS A remote user may be able to cause unexpected system termination or corrupt kernel memory NoYesYesYesNoNoNoNo CVE-2026-43710 HFS An attacker may be able to cause unexpected system termination or corrupt kernel memory NoYesYesYesNoNoNoNo CVE-2026-43764 HFS An app may be able to cause unexpected system termination NoYesYesYesNoNoNoNo CVE-2026-43767 HFS An app may be able to cause unexpected system termination NoYesYesYesNoNoNoNo CVE-2026-43773 HFS Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory NoYesYesYesNoNoNoNo CVE-2026-64697 HFS An app may be able to cause unexpected system termination or corrupt kernel memory NoYesYesYesNoNoNoNo CVE-2025-43325 Icons An app may be able to access sensitive user data NoNoYesYesNoNoNoNo CVE-2026-43661 ImageIO Processing a maliciously crafted image may corrupt process memory NoNoYesYesNoNoNoNo CVE-2026-43780 ImageIO Processing a maliciously crafted texture may lead to unexpected app termination YesYesYesYesYesYesYesNo CVE-2026-43818 ImageIO Processing a maliciously crafted image may lead to arbitrary code execution YesYesYesYesNoNoNoNo CVE-2026-64693 ImageIO Processing a maliciously crafted image may lead to a denial-of-service YesYesYesYesYesYesYesNo CVE-2026-64716 ImageIO Processing a maliciously crafted image may corrupt process memory YesYesYesYesYesYesYesNo CVE-2026-64754 ImageIO Processing a maliciously crafted file may lead to a denial-of-service YesYesYesYesYesYesYesNo CVE-2026-64758 ImageIO Processing a maliciously crafted file may lead to unexpected app termination YesYesNoNoYesYesYesNo CVE-2026-43743 IOGPUFamily An app may be able to cause unexpected system termination NoNoNoNoYesYesNoNo CVE-2026-43805 IOKit An app may be able to cause unexpected system termination or write kernel memory YesYesYesYesNoYesNoNo CVE-2026-39877 IOSkywalkFamily An app may be able to disclose kernel memory NoNoYesYesNoNoNoNo CVE-2026-28931 Kernel Connecting to a malicious NFS server may lead to kernel memory corruption YesYesNoNoYesYesNoNo CVE-2026-28982 Kernel A remote user may be able to cause unexpected system termination or corrupt kernel memory NoYesYesYesNoNoNoNo CVE-2026-39868 Kernel An app may be able to cause unexpected system termination or corrupt kernel memory NoNoYesYesYesYesYesNo CVE-2026-43722 Kernel An app may be able to leak sensitive kernel state NoNoYesYesNoNoNoNo CVE-2026-43724 Kernel An app may be able to cause unexpected system termination or write kernel memory NoNoYesYesYesYesYesNo CVE-2026-43739 Kernel An app may be able to cause unexpected system termination YesYesNoNoYesYesYesNo CVE-2026-43754 Kernel An app may be able to leak sensitive kernel state NoYesYesYesNoNoNoNo CVE-2026-43757 Kernel An app may be able to cause unexpected system termination NoYesYesYesNoNoNoNo CVE-2026-43769 Kernel An app may be able to cause unexpected system termination YesYesYesYesYesYesYesNo CVE-2026-43778 Kernel An app may be able to cause unexpected system termination or corrupt kernel memory YesYesYesYesYesYesYesNo CVE-2026-43782 Kernel An app may be able to access sensitive user data NoYesYesYesNoNoNoNo CVE-2026-43799 Kernel An app may be able to cause unexpected system termination YesYesYesYesYesYesYesNo CVE-2026-43809 Kernel An app may be able to cause unexpected system termination NoYesYesYesNoNoNoNo CVE-2026-43810 Kernel A remote user may be able to cause unexpected system termination or corrupt kernel memory YesYesYesYesYesYesYesNo CVE-2026-43814 Kernel An app may be able to cause unexpected system termination YesYesNoNoYesYesNoNo CVE-2026-43816 Kernel An app may be able to cause unexpected system termination YesYesNoNoYesYesYesNo CVE-2026-43817 Kernel An app may be able to cause unexpected system termination YesYesNoNoYesYesYesNo CVE-2026-43822 Kernel An app may be able to cause unexpected system termination YesYesYesYesYesYesYesNo CVE-2026-64700 Kernel An app may be able to cause unexpected system termination YesYesYesYesYesYesYesNo CVE-2026-64709 Kernel An app may be able to disclose kernel memory YesYesYesYesYesYesYesNo CVE-2026-64720 Kernel An app may be able to cause unexpected system termination YesYesNoNoYesYesNoNo CVE-2026-64721 Kernel An app may be able to access sensitive user data YesYesYesYesYesYesYesNo CVE-2026-64723 Kernel An app may be able to access sensitive user data NoYesYesYesNoNoNoNo CVE-2026-64727 Kernel An app may be able to cause unexpected system termination NoYesNoNoYesNoNoNo CVE-2026-64729 Kernel An app may be able to cause unexpected system termination YesYesNoNoYesYesYesNo CVE-2026-64735 Kernel A remote attacker may be able to bypass network filters YesYesYesYesYesYesYesNo CVE-2026-64744 Kernel An app may be able to disclose kernel memory NoYesYesYesNoNoNoNo CVE-2026-64749 Kernel An app may be able to cause unexpected system termination or corrupt kernel memory YesYesYesNoNoNoYesNo CVE-2026-64751 Kernel An app may be able to cause unexpected system termination or write kernel memory YesYesNoNoYesYesYesNo CVE-2026-64775 Kernel An app may be able to cause unexpected system termination YesYesYesYesYesYesYesNo CVE-2026-20672 LaunchServices An app may be able to access sensitive user data NoNoYesYesNoNoNoNo CVE-2026-28983 LaunchServices A remote attacker may be able to cause a denial of service NoNoYesYesNoNoNoNo CVE-2026-28900 libarchive A maliciously crafted ZIP archive may bypass Gatekeeper checks NoNoYesYesNoNoNoNo CVE-2026-4424 libarchive Processing a maliciously crafted file may result in disclosure of process memory YesYesYesYesNoNoYesNo CVE-2026-28973 libc A malicious app may be able to break out of its sandbox YesYesYesYesNoYesNoNo CVE-2026-64739 Libnotify An attacker may be able to cause unexpected app termination YesYesYesYesYesYesYesNo CVE-2026-43703 libxslt Processing maliciously crafted web content may lead to an unexpected process crash NoNoYesYesYesYesYesNo CVE-2026-43706 libxslt Processing maliciously crafted web content may lead to an unexpected process crash NoNoYesYesYesYesYesNo CVE-2026-43766 LoginWindow An attacker with physical access to a locked device may be able to view sensitive user information NoYesYesYesNoNoNoNo CVE-2026-64743 Managed Configuration An app may be able to access sensitive user data YesYesNoNoYesYesYesNo CVE-2026-64738 Maps A malicious app may be able to break out of its sandbox NoYesYesYesNoNoNoNo CVE-2026-43653 mDNSResponder An attacker on the local network may be able to cause a denial-of-service NoNoYesNoNoNoNoNo CVE-2026-43806 mDNSResponder A local attacker may be able to cause a denial of service NoYesNoNoNoNoNoNo CVE-2026-64724 mDNSResponder An attacker on the local network may be able to cause a denial-of-service YesYesYesYesYesYesYesNo CVE-2026-43723 MediaRemote An app may be able to gain root privileges YesYesYesYesYesYesYesNo CVE-2026-28911 Metal A malicious app may be able to corrupt memory of a system process NoYesNoYesNoNoNoNo CVE-2026-43807 MobileAccessoryUpdater A malicious accessory may be able to cause unexpected app termination NoNoYesYesYesYesYesNo CVE-2026-43729 Model I/O Processing a maliciously crafted image may corrupt process memory YesYesYesNoYesNoYesNo CVE-2026-43733 Model I/O Processing a maliciously crafted image may corrupt process memory YesYesYesNoNoNoNoNo CVE-2026-64722 Model I/O Processing a 3D model may result in disclosure of process memory YesYesYesNoNoNoNoNo CVE-2026-64768 Model I/O A remote attacker may cause an unexpected app termination YesYesYesYesYesNoYesNo CVE-2026-64769 Model I/O A remote attacker may be able to cause unexpected application termination or heap corruption YesYesYesYesYesNoYesNo CVE-2026-64770 Model I/O A remote attacker may be able to cause unexpected application termination or heap corruption YesYesYesYesYesNoYesNo CVE-2026-64771 Model I/O A remote attacker may be able to cause unexpected application termination or heap corruption YesYesYesNoYesNoYesNo CVE-2026-64772 Model I/O A remote attacker may be able to cause unexpected application termination or heap corruption YesYesYesNoYesNoYesNo CVE-2026-64774 Model I/O A remote attacker may be able to cause unexpected application termination or heap corruption YesYesYesYesYesNoYesNo CVE-2026-43771 Net-SNMP An app may be able to cause a denial-of-service NoYesYesYesNoNoNoNo CVE-2026-43772 NetFSFramework An app may be able to break out of its sandbox NoYesYesYesNoNoNoNo CVE-2026-28961 Network Extensions An attacker with physical access to a locked device may be able to view sensitive user information NoNoYesYesNoNoNoNo CVE-2026-64711 NSColorPanel An app may be able to leak sensitive user information YesYesYesYesNoNoNoNo CVE-2026-28912 PackageKit A user may be able to elevate privileges NoYesYesNoNoNoNoNo CVE-2026-43765 PackageKit An app may be able to modify protected parts of the file system NoYesYesYesNoNoNoNo CVE-2026-28896 ppp An attacker may be able to cause unexpected system termination or read kernel memory NoNoYesYesNoNoNoNo CVE-2026-64731 Printing A malicious app may be able to break out of its sandbox NoYesYesNoNoNoNoNo CVE-2026-43812 Pro Res An app may be able to cause unexpected system termination YesYesYesNoYesNoYesNo CVE-2026-43694 quarantine An app may be able to cause unexpected system termination or write kernel memory NoYesYesYesNoNoNoNo CVE-2026-39874 Remote Management A malicious app may be able to gain root privileges NoYesYesYesNoNoNoNo CVE-2026-43792 Safari An app may be able to access sensitive user data NoYesNoNoNoNoNoYes CVE-2026-64741 Sandbox Profiles An app may be able to read a persistent device identifier YesNoNoNoYesYesYesNo CVE-2026-64763 SceneKit Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution YesYesYesYesYesYesYesNo CVE-2026-64764 SceneKit Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution YesYesYesYesYesYesYesNo CVE-2026-64765 SceneKit Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution YesYesYesYesYesYesYesNo CVE-2026-64766 SceneKit Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution YesYesYesYesYesYesYesNo CVE-2026-43665 Screen Sharing Server A local attacker may be able to determine the legacy VNC password configured for Screen Sharing NoNoYesYesNoNoNoNo CVE-2026-43760 Screen Sharing Server An app may be able to access user-sensitive data NoYesNoYesNoNoNoNo CVE-2026-43777 Screen Sharing Server A remote attacker may be able to cause a denial of service NoYesYesYesNoNoNoNo CVE-2026-43779 Screen Sharing Server An app may be able to intercept network connections intended for another process NoYesYesYesNoNoNoNo CVE-2026-43728 Security An attacker may be able to modify the state of the Keychain NoYesNoNoNoNoNoNo CVE-2026-43755 SecurityAgent An app may be able to gain root privileges NoYesNoYesNoNoNoNo CVE-2026-43800 Siri An app may be able to access sensitive user data YesYesNoNoYesYesNoNo CVE-2026-64745 Siri A person with physical access to a locked device may be able to access contacts and photos NoYesYesNoNoNoNoNo CVE-2026-39873 SMB Connecting to a malicious SMB server may lead to unexpected system termination NoYesYesYesNoNoNoNo CVE-2026-64696 SMB A remote user may be able to cause unexpected system termination or corrupt kernel memory NoYesYesYesNoNoNoNo CVE-2026-64704 SMB An app may be able to cause unexpected system termination NoYesYesYesNoNoNoNo CVE-2026-43774 Spotlight An app may be able to access sensitive user data NoYesYesYesNoNoNoNo CVE-2026-43770 StorageKit An app may be able to access sensitive user data NoYesYesYesYesNoNoNo CVE-2026-43768 udf An app may be able to cause unexpected system termination NoYesYesYesNoNoNoNo CVE-2026-43704 Web Extensions A malicious web extension may be able to cause an unexpected process crash NoNoNoNoYesYesYesNo CVE-2026-64699 WebDAV An app may be able to disclose kernel memory NoYesYesYesNoNoNoNo CVE-2026-64703 WebDAV An app may be able to cause a denial-of-service NoYesYesYesNoNoNoNo CVE-2026-39872 WebKit Processing maliciously crafted web content may lead to an unexpected process crash NoNoNoNoYesYesYesNo CVE-2026-43663 WebKit Processing maliciously crafted web content may lead to an unexpected process crash NoNoNoNoYesYesYesNo CVE-2026-43676 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash NoNoNoNoNoYesYesNo CVE-2026-43699 WebKit Processing maliciously crafted web content may lead to an unexpected process crash NoNoNoNoYesYesYesNo CVE-2026-43700 WebKit Processing maliciously crafted web content may disclose sensitive user information NoNoNoNoYesYesYesNo CVE-2026-43701 WebKit A malicious website may be able to process restricted web content outside the sandbox NoNoNoNoYesYesYesNo CVE-2026-43705 WebKit Processing maliciously crafted web content may lead to memory corruption NoNoNoNoYesYesYesNo CVE-2026-43707 WebKit Processing maliciously crafted web content may lead to an unexpected process crash NoNoNoNoYesYesYesNo CVE-2026-43708 WebKit A malicious website may exfiltrate data cross-origin NoNoNoNoYesYesYesNo CVE-2026-43709 WebKit Processing maliciously crafted web content may lead to an unexpected process crash NoNoNoNoYesYesYesNo CVE-2026-43712 WebKit Processing maliciously crafted web content may lead to an unexpected process crash NoNoNoNoYesYesYesNo CVE-2026-43713 WebKit Visiting a website may leak sensitive data NoNoNoNoYesYesYesNo CVE-2026-43715 WebKit Processing maliciously crafted web content may lead to memory corruption NoNoNoNoYesYesYesNo CVE-2026-43725 WebKit A malicious website may be able to process restricted web content outside the sandbox NoNoNoNoYesYesYesNo CVE-2026-43726 WebKit Processing maliciously crafted web content may lead to an unexpected process crash NoNoNoNoYesYesYesNo CVE-2026-43727 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash NoNoNoNoNoYesYesNo CVE-2026-43731 WebKit Processing maliciously crafted web content may lead to memory corruption NoNoNoNoYesYesYesNo CVE-2026-43732 WebKit Processing maliciously crafted web content may disclose sensitive user information NoNoNoNoYesYesYesNo CVE-2026-43734 WebKit Processing maliciously crafted web content may lead to an unexpected process crash NoNoNoNoYesYesYesNo CVE-2026-43735 WebKit A malicious website may exfiltrate data cross-origin NoNoNoNoYesYesYesNo CVE-2026-43740 WebKit Processing maliciously crafted web content may result in the disclosure of process memory YesNoNoNoYesYesYesYes CVE-2026-43742 WebKit Processing maliciously crafted web content may lead to an unexpected process crash NoNoNoNoYesYesYesNo CVE-2026-43745 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash NoNoNoNoYesYesYesNo CVE-2026-43804 WebKit Visiting a website may lead to an app denial-of-service YesYesNoNoNoNoYesYes CVE-2026-43821 WebKit An app may be able to read files outside of its sandbox YesYesNoNoYesYesYesYes CVE-2026-64713 WebKit Websites may know if the user has visited a given link YesYesNoNoYesYesYesYes CVE-2026-64728 WebKit Maliciously crafted web content may violate iframe sandboxing policy YesYesNoNoYesYesYesYes CVE-2026-64730 WebKit Visiting a website that frames malicious content may lead to UI spoofing YesYesNoNoYesYesYesYes CVE-2026-64757 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash YesYesNoNoNoYesYesYes CVE-2026-64783 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash YesYesNoNoNoYesYesYes CVE-2026-43720 WebKit Canvas Processing maliciously crafted web content may lead to an unexpected Safari crash NoNoNoNoYesYesYesNo CVE-2026-64718 WebKit Canvas Processing maliciously crafted web content may lead to an unexpected Safari crash YesYesNoNoYesYesYesYes CVE-2026-43721 WebKit Storage A malicious website may be able to silently hijack clipboard data NoNoNoNoYesYesYesNo CVE-2026-28979 WebRTC Processing maliciously crafted web content may lead to an unexpected process crash NoNoNoNoYesYesYesNo CVE-2026-43717 WebRTC Processing maliciously crafted web content may lead to an unexpected Safari crash NoNoNoNoYesYesNoNo CVE-2026-43718 WebRTC Processing maliciously crafted web content may lead to an unexpected Safari crash NoNoNoNoYesYesYesNo CVE-2026-64719 WebRTC Processing maliciously crafted web content may lead to an unexpected Safari crash YesYesNoNoYesYesYesYes CVE-2026-43750 Wi-Fi An app may be able to execute arbitrary code out of its sandbox or with certain elevated privileges NoYesYesYesNoNoNoNo CVE-2026-64726 Wi-Fi An attacker in physical proximity may be able to corrupt process memory YesYesNoNoYesYesYesNo CVE-2026-64755 WorkoutKit An app may be able to access sensitive user data YesNoNoNoNoNoNoNo CVE-2026-28932 xar An app may be able to cause a denial of service NoYesYesYesNoNoNoNo CVE-2026-28914 zip A maliciously crafted ZIP archive may bypass Gatekeeper checks NoNoYesYesNoNoNoNo

We’ll continue these macOS updates if people find them useful. Stay tuned for the regularly schedule Patch Tuesday blog covering Adobe and Microsoft.

If you just want to read the rules, you can find them here.

 

Pwn2Own Ireland returns for 2026, and it’s the third year for this event in the Emerald Isle. Despite the dreary Irish skies (and the threat of a random banshee), we had an amazing event, even if we did end up in a jail at the end. With that in mind, we’re excited to return to Cork this fall for yet another great Pwn2Own event. We’ll also be returning to some of the great pubs Ireland has to offer in the evenings and wrapping the event up at a special location (stay tuned for that announcement).

As for the contest itself, it will run from October 6-9, 2026. As always, we’ll have a random drawing to determine the schedule of attempts on the first day of the contest, and we will proceed from there. Registration closes at 5:00 p.m. Irish Standard Time on Oct 1st, 2026. There are no exceptions for late entries, so if you have questions, please contact us at [email protected] (note the address). We will be happy to address your issues or concerns directly.

Due to the overwhelming amount of registrations and last-minute entries for our Pwn2Own Berlin event, we’re changing who can enter the contest a bit to ensure it’s fair for all researchers. To enter, you must have received an aggregate bounty payment totaling at least $15,000 during their life-time participation in ZDI. This includes past Pwn2Own events and our regular bug bounty program. We recognize there may be some who haven’t participated in the past with great exploits to demonstrate, so we will also accept up to 10 new contestants at our discretion. We’re capping the number of entries to 80 this year. Once we have 80 qualifying entries, we will close registration. That means if you want to enter, it is in your best interest to contact us sooner rather than later. Please read the rules thoroughly to ensure you meet all the requirements.

Now on to this year’s target categories. We’ll have seven different categories for this year’s event:

-- Mobile Phones
-- Smart Home Devices
-- Wellness
-- Printers
-- Messaging
-- AI Infrastructure
-- AI Coding Agents

Let’s take a look at each category in more detail, starting with mobile phones.

The Target Phones

Back in Amsterdam where this contest originated, it was originally dubbed “Mobile Pwn2Own” and our focus was strictly on phones. Mobile handsets remain at the heart of this event, and some of the Samsung entries from last year were absolutely smashing. As always, these phones will be running the latest version of their respective operating systems with all available updates installed. Last year we also introduced the USB attack vector, but no one submitted an entry for it. We’ll see if that changes this year.

Otherwise, contestants must compromise the device by browsing to content in the default browser for the target under test or by communicating with the following short-distance protocols: near field communication (NFC), Wi-Fi, or Bluetooth. The awards for this category are:

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Smart Home Devices

As you might have noticed, we have eliminated most of the consumer-related devices from this year’s event. However, there are still a few “pro-sumer” devices that still could have an impact on enterprises, and the first of these categories are the devices that control other devices and services. An attempt in this category must be launched against the target’s exposed network services, RF attack surface, or exposed features from the contestant’s laptop within the contest network.

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Wellness Category

This is one of the new categories this year and our first foray into the world of healthcare devices. However, we don’t intend to make this too easy. Entries that require physically pressing any button on the target, or the use of any information, code or PIN printed on the device, are out of scope. Entries that require the contestant to be paired to the target prior to the start of the attempt are not in scope. An attempt in this category must be launched against the target’s exposed network services, RF attack surface, or exposed features from the contestant’s laptop within the contest network.

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Rage Against the Printers

Printers have long been the source of jokes and memes, but they are also an often overlooked attack surface in your office. The printer category always produces some interesting results, often by playing music it shouldn’t or the occasional Rick Roll. We’ve reduced the number of targets in this category this year, but we still expect to see some interesting exploits in these oft unheralded targets.

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The Messaging Category

We introduced WhatsApp as a target last year and came close to seeing a functioning exploit. Sadly, that didn’t happen. However, WhatsApp is used by more than three billion people globally, and some of the messages transmitted can be quite sensitive. That’s why we are bringing it back and hoping for some better results. We know the bugs are out there. We’re just hoping the right researcher decides to show us an exploit that leads to code execution. All of the target handset will be available as clients. Here’s the full prize list for Messaging category:

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AI Infrastructure Category

We introduced these targets at Pwn2Own Berlin, and we saw such…uh…enthusiasm from the community that we decided to immediately bring them back for our Ireland event. An attempt in this category must be launched from the contestant’s laptop. Here’s a look at the targets and awards in the AI Infrastructure category:

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AI Coding Agent Category

Let’s face it. At some point or another, we’ve probably all vibe coded something. There’s no shame in that, but how secure are the tools we use for vibe coding? Well, let’s take the most popular choices and find out. A successful entry must interact with a contestant-controlled resource (e.g. web page, repository, media file) to exploit a vulnerability within the coding agent. The attack vector of the entry must be a common coding agent use case. There are few things out of scope here as well. UI spoofing or misrepresentation unrelated to permission prompts, model jailbreaks or prompt outputs that do not cross security boundaries, and vulnerabilities that require unsafe or permission-less modes are just a few of the things not allowed. As this is a recently updated category, please read the rules carefully to ensure your entry qualifies. Here’s a look at the targets and awards in the AI Coding Agent category:

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Master of Pwn

No Pwn2Own contest would be complete without crowning a Master of Pwn, which signifies the overall winner of the competition. Earning the title results in a slick trophy, a different sort of wearable, and brings with it an additional 65,000 ZDI reward points (instant Platinum status in 2027).

For those not familiar with how it works, points are accumulated for each successful attempt. While only the first demonstration in a category wins the full cash award, each successful entry claims the full number of Master of Pwn points. Since the order of attempts is determined by a random draw, those who receive later slots can still claim the Master of Pwn title – even if they earn a lower cash payout. As with previous contests, there are penalties for withdrawing from an attempt once you register for it. If the contestant decides to remove an Add-on Bonus during their attempt, the Master of Pwn points for that Add-on Bonus will be deducted from the final point total for that attempt. For example, someone registers for the Apple iPhone 15 with the Kernel Bonus Add-on. During the attempt, the contestant drops the Kernel Bonus Add-on but completes the attempt. The final point total will be 20 Master of Pwn points.

The Complete Details

The full set of rules for Pwn2Own Ireland 2026 can be found here. They may be changed at any time without notice. We highly encourage potential entrants to read the rules thoroughly and completely should they choose to participate. We also encourage contestants to read this blog covering what to expect when participating in Pwn2Own.

Registration is required to ensure we have sufficient resources on hand at the event. Please contact ZDI at [email protected] to begin the registration process. (Email only, please; queries via social media, blog post, or other means will not be acknowledged or answered.) If we receive more than one registration for any category, we’ll hold a random drawing to determine the contest order. Registration closes at 5:00 p.m. Irish Standard Time on Oct 1st, 2025.

The Results

We’ll be blogging and tweeting results in real-time throughout the competition. Be sure to keep an eye on the blog for the latest information. Follow us on Twitter at @thezdi and @trendaisecurity, and keep an eye on the #P2OIreland hashtag for continuing coverage.

We look forward to seeing everyone in Cork, and we look forward to seeing what new exploits and attack techniques they bring with them.

 

©2026 Trend Micro Incorporated. All rights reserved. PWN2OWN, ZERO DAY INITIATIVE, ZDI, TrendAI, and Trend Micro are trademarks or registered trademarks of Trend Micro Incorporated. All other trademarks and trade names are the property of their respective owners.

Well folks. Here we are. The bug apocalypse has fully descended upon us. I’ll do my best to sort this out in some way meaningful, but this month’s release shows us the nay-sayers were right, and I’ve got to hand it to the nay-sayers here. Excellent call. Take an extended break from your regularly scheduled activities as we let’s take a look at the latest security patches from Adobe and Microsoft. If you’d rather watch the full video recap covering the entire release, you can check it out here:

Adobe Patches for July 2026

Adobe has now moved to a bimonthly release schedule, which means they will be releasing patches on the second and fourth Tuesdays of the month. I’ll continue to cover the second Tuesday release here and update this blog should the fourth Tuesday release contain anything significant. I think this is a smart way to break up a monster release into something a bit more manageable. Apple has said they are taking a similar approach. We’ll see if other vendors follow their lead.

For the first part of the July release, Adobe released 12 bulletins addressing 88 unique CVEs in Adobe ColdFusion, Commerce, After Effects, Animate, Audition, Bridge, Creative Cloud Desktop Application, Experience Manager, Illustrator, Media Encoder, Premiere Pro, and the Content Credentials SDK.

Here’s this month’s overview table:

Bulletin ID Product CVE Count Highest Severity Highest CVSS Exploited Deployment Priority APSB26-82 Adobe ColdFusion 13 Critical 9.9 No 1 APSB26-73 Adobe Commerce 13 Critical 9.6 No 2 APSB26-78 Adobe After Effects 3 Critical 7.8 No 3 APSB26-83 Adobe Animate 6 Critical 8.6 No 3 APSB26-71 Adobe Audition 6 Critical 7.8 No 3 APSB26-81 Adobe Bridge 6 Critical 7.8 No 3 APSB26-77 Adobe Creative Cloud Desktop Application 2 Critical 8.1 No 3 APSB26-74 Adobe Experience Manager 13 Critical 9.6 No 3 APSB26-79 Adobe Illustrator 5 Critical 9.3 No 3 APSB26-72 Adobe Media Encoder 5 Critical 7.8 No 3 APSB26-76 Adobe Premiere Pro 4 Critical 7.8 No 3 APSB26-80 Content Credentials SDK 12 Critical 8.2 No 3 TOTAL 12 bulletins 88

While nothing is under active exploit, I would prioritize the Cold Fusion and Commerce patches first. The patch for Cold Fusion even clocks in with a CVSS 9.9 bug. Beyond that, most of these updates are pretty straightforward. If you’re using these products, patch them. However, you can use you regular patch cadence here.

Microsoft Patches for July 2026

Here it is. The Mother of All Releases. To call this record-breaking is an understatement. How to count this mess is anyone’s guess, but I see new Microsoft 621 CVEs for the month of July. Some of these are in online services where no user action is required. They also list about 480 bugs in Chromium and Microsoft Edge (Chromium-based) that I won’t cover here. Here’s how I put this in context. I looked at the last 20 years of Microsoft releases. The CVE count year-to-date exceeds all other years’ totals.

The products covered this month are also astonishing. There are patches for Windows and Windows components, Office and Office Components, Microsoft Edge (Chromium-based), Azure, .NET and Visual Studio, Github Copilot, Defender, Exchange Server, Hyper-V, Ages of Empire II, and Minecraft Server (really!). That phrase “Windows components” does some pretty heavy lifting here, too, as just about everything you’ve ever heard of is getting patched. All told, there are 63 rated Critical, six rated Moderate, one rated Low, with the rest rated Important in severity. Eight of these bugs were submitted through the ZDI program (more on that later). Two CVEs are listed as under active exploit while one other is listed as publicly known.

So how do we eat this elephant? One byte at a time (pun intended). Let’s start by looking a closer look at some of the more interesting updates for this month, starting with the bugs being exploited in the wild.

-    CVE-2026-56155 - Active Directory Federation Services Elevation of Privilege Vulnerability
This is one of several AD FS being patched this month, but it’s the only one being actively exploited. It stems from insufficient access-control granularity and does require local access and low privileges to start, but AD FS is exactly the kind of identity infrastructure attackers love to pivot through once they're in. It can also be paired with an RCE as we often see in ransomware. Test and deploy this patch quickly.

-    CVE-2026-56164 - Microsoft SharePoint Server Elevation of Privilege Vulnerability
The other bug being exploited in the wild this month is a modest CVSS 5.3 – but it shows why Moderate severity bugs still matter. It's a missing-authentication flaw, meaning an unauthenticated attacker can hit it over the network with no user interaction required. When something this reachable is being actively abused, patch it now and worry about the score later.

-    CVE-2026-57092 - Microsoft Windows VMSwitch Elevation of Privilege Vulnerability
This patch rates the highest CVSS score for the month: a solid 9.9. It’s a use-after-free that lets a low-privileged attacker escalate to full host compromise across a VM boundary. We saw something like this demonstrated at Pwn2Own Berlin on ESXi, but it clearly isn’t alone. If you’re using VMSwitch in your Hyper-V deployments (and you likely are), test and deploy this one quickly.

-    CVE-2026-50522/58644 - Microsoft SharePoint Remote Code Execution Vulnerability
This matching pair of CVSS 9.8 bugs results from the deserialization-of-untrusted-data and are reachable without authentication or user interaction. CVE-2026-50522 was demonstrated during Pwn2Own Berlin, so it’s odd to see Microsoft list it as “Exploit Maturity Unknown” since we literally handed them a working exploit. Just another reason to do your own risk assessment and not rely 100% on the vendor. If you have any Internet accessible SharePoint servers, test and deploy this patch quickly.

-    CVE-2026-56190 - Remote Desktop Protocol Remote Code Execution Vulnerability
This patch covers an unauthenticated, network-reachable, no user interaction required bug. The root cause is a classic one: use of uninitialized resource (CWE-908), meaning specially crafted RDP traffic can interact with memory that was never properly initialized, letting an attacker corrupt memory and potentially steer code execution. RDP Servers are a common target, so audit your systems to see which are internet accessible and start from there.

-    CVE-2026-55008 - Microsoft Exchange Server Spoofing Vulnerability
Ignore the title here and treat this like the XSS bug it is. The vulnerability is listed as a CVSS 9.6 since it’s a stored cross-site scripting flaw in Outlook Web Access, with a scope-changed impact that lets it break out of the web app context entirely. An attacker sends a specially crafted email, and if the victim simply opens it in OWA, arbitrary JavaScript executes in their browser session — no attachment needed, no macro warning, just viewing the message does it. If you’re using OWA, test and deploy this one quickly.

-    CVE-2026-50518 - Windows DHCP Server Remote Code Execution Vulnerability
There are a couple of these DHCP RCE patches in this release, but the other has caveats while this one does not. Both are heap-based buffer overflows scoring CVSS 9.8, both unauthenticated and network-reachable. If you're running DHCP Server role on anything Internet-adjacent (you're not, right?), these move to the top of the list.

-    CVE-2026-56188 - Windows Server Network driver Remote Code Execution Vulnerability
Another Critical-rated bug, this one is caused by a race condition. It’s always fun to see a TOCTOU bug rated this high, since race conditions are notoriously finicky to exploit reliably. While it may prove tricky to exploit, this bug could allow an attacker to execute privileged code over the network without user interaction. Don’t let the race condition lull you to sleep on a wormable bug.

-    CVE-2026-55010 - Minecraft Bedrock Dedicated Server Remote Code Execution Vulnerability
File this in the “why not” category. This bug is a heap-based buffer overflow in Minecraft Bedrock Dedicated Server, also CVSS 9.8 and also unauthenticated RCE. Yes, your kid’s Minecraft server (it is your kid’s server, right?) is exposed to the same class of bug as your DHCP infrastructure. Patch it anyway.

Here’s the full list of CVEs released by Microsoft for July 2026:

CVE Title Severity CVSS Public Exploited Type CVE-2026-56155 Active Directory Federation Services Elevation of Privilege Vulnerability Important 7.8 No Yes EoP CVE-2026-56164 Microsoft SharePoint Server Elevation of Privilege Vulnerability Moderate 5.3 No Yes EoP CVE-2026-50661 Windows BitLocker Security Feature Bypass Vulnerability Important 6.1 Yes No SFB CVE-2026-54121 Active Directory Certificate Services Elevation of Privilege Vulnerability Critical 8.8 No No EoP CVE-2026-45499 ** Azure OpenAI Elevation of Privilege Vulnerability Critical 9.9 No No EoP CVE-2026-48564 DHCP Server Service Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-50370 DHCP Server Service Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-56159 DHCP Server Service Remote Code Execution Vulnerability Critical 9.8 No No RCE CVE-2026-50382 DirectX Graphics Kernel Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-41106 ** Microsoft 365 Copilot Elevation of Privilege Vulnerability Critical 9.3 No No EoP CVE-2026-26145 ** Microsoft Azure Synapse Elevation of Privilege Vulnerability Critical 4.8 No No EoP CVE-2026-48561 Microsoft Copilot Remote Code Execution Vulnerability Critical 9.6 No No RCE CVE-2026-55011 Microsoft Defender Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55012 Microsoft Defender Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55944 Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Code Execution Vulnerability Critical 9.8 No No RCE CVE-2026-57100 ** Microsoft Entra Provisioning Service Elevation of Privilege Vulnerability Critical 9.9 No No EoP CVE-2026-55041 Microsoft Excel Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-54998 ** Microsoft Exchange Online Elevation of Privilege Vulnerability Critical 8.8 No No EoP CVE-2026-55008 Microsoft Exchange Server Spoofing Vulnerability Critical 9.6 No No Spoofing CVE-2026-54992 Microsoft Message Queuing Queue Manager Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-50314 Microsoft Office Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-50467 Microsoft Office Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55018 Microsoft Office Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55022 Microsoft Office Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55045 Microsoft Office Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-55049 Microsoft Office Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55129 Microsoft Office Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55056 Microsoft Office Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55140 Microsoft Office Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55043 Microsoft PowerPoint Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55123 Microsoft PowerPoint Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55120 Microsoft PowerPoint Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-50522 Microsoft SharePoint Remote Code Execution Vulnerability Critical 9.8 No No RCE CVE-2026-58644 Microsoft SharePoint Remote Code Execution Vulnerability Critical 9.8 No No RCE CVE-2026-55040 Microsoft SharePoint Server Security Feature Bypass Vulnerability Critical 9.1 No No SFB CVE-2026-54117 Microsoft SQL Server Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-54118 Microsoft SQL Server Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-50655 Microsoft Windows Media Foundation Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-56189 Microsoft Windows Media Foundation Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-57090 Microsoft Windows Media Foundation Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-57094 Microsoft Windows Media Foundation Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-57087 Microsoft Windows Media Foundation Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-57092 Microsoft Windows VMSwitch Elevation of Privilege Vulnerability Critical 9.9 No No EoP CVE-2026-55033 Microsoft Word Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55127 Microsoft Word Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55132 Microsoft Word Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-55010 Minecraft Bedrock Dedicated Server Remote Code Execution Vulnerability Critical 9.8 No No RCE CVE-2026-50474 Remote Desktop Client Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-49164 Windows Active Directory Domain Services Remote Code Execution Vulnerability Critical 8.1 No No RCE CVE-2026-54128 Windows DHCP Client Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-50518 Windows DHCP Server Remote Code Execution Vulnerability Critical 9.8 No No RCE CVE-2026-49796 Windows GDI+ Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-50380 Windows GDI+ Remote Code Execution Vulnerability Critical 9.6 No No RCE CVE-2026-54127 Windows Hyper-V Elevation of Privilege Vulnerability Critical 7.4 No No EoP CVE-2026-50680 Windows Hyper-V Elevation of Privilege Vulnerability Critical 8.2 No No EoP CVE-2026-50327 Windows Media Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-58542 Windows Media Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-58608 Windows Print Spooler Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-54982 Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-54995 Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability Critical 8.1 No No RCE CVE-2026-42982 Windows Secure Kernel Mode Elevation of Privilege Vulnerability Critical 7.8 No No EoP CVE-2026-50392 Windows Secure Kernel Mode Elevation of Privilege Vulnerability Critical 7 No No EoP CVE-2026-50694 Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability Critical 8.1 No No RCE CVE-2026-56188 Windows Server Network driver Remote Code Execution Vulnerability Critical 9.8 No No RCE CVE-2026-50444 Windows Server Update Service (WSUS) Elevation of Privilege Vulnerability Critical 8.8 No No EoP CVE-2026-54999 Windows TCP/IP Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-47302 .NET Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50525 .NET Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50651 .NET Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-57108 .NET Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50524 .NET Framework Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50527 .NET Framework Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50648 .NET Framework Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50650 .NET Framework Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50646 .NET Framework Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50649 .NET Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-47304 .NET Security Feature Bypass Vulnerability Important 8.1 No No SFB CVE-2026-50528 .NET Security Feature Bypass Vulnerability Important 8.2 No No SFB CVE-2026-50659 .NET Spoofing Vulnerability Important 6.5 No No Spoofing CVE-2026-50526 .NET Tampering Vulnerability Important 7 No No Tampering CVE-2026-50682 Active Directory Denial of Service Vulnerability Important 7.1 No No DoS CVE-2026-55001 Active Directory Domain Services Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50647 Active Directory Federation Server Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50684 Active Directory Federation Server Spoofing Vulnerability Important 4.8 No No Spoofing CVE-2026-56170 ASP.NET Core Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-47300 ASP.NET Core Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-47303 ASP.NET Core Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-50652 Azure Active Directory Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50653 Azure Active Directory Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-57969 Azure CycleCloud Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-58279 Azure CycleCloud Elevation of Privilege Vulnerability Important 6.5 No No EoP CVE-2026-47632 Azure Monitor Agent Metrics Extension Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-50338 Azure Spring Apps Elevation of Privilege Vulnerability Important 8.2 No No EoP CVE-2026-50488 Clipboard User Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50491 Code Integrity DLL (ci.dll) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50381 Composite Image File System driver (cimfs.sys) Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50427 Content Delivery Manager Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50692 Desktop Window Manager Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-58633 Desktop Window Manager Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58634 Desktop Window Manager Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50296 DirectX Graphics Kernel Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50375 DirectX Graphics Kernel Elevation of Privilege Vulnerability Important 6.3 No No EoP CVE-2026-50353 DirectX Graphics Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50493 DirectX Graphics Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-56643 DirectX Graphics Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-56644 DirectX Graphics Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58629 DirectX Graphics Kernel Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-49174 DNS Client Tampering Vulnerability Important 6.1 No No Tampering CVE-2026-50495 DNS Client Tampering Vulnerability Important 6.1 No No Tampering CVE-2026-57088 Extensible Storage Engine (ESENT) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50663 Game: Age of Empires II: Definitive Edition Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-47282 GitHub Copilot and Visual Studio Code Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-41109 GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability Important 8.8 No No SFB CVE-2026-50510 GitHub Copilot Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-49787 HTTP.sys Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50420 HTTP.sys Information Disclosure Vulnerability Important 6.2 No No Info CVE-2026-49788 HTTP/2 Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50696 Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-58617 M365 Copilot for iOS Elevation of Privilege Vulnerability Important 8.1 No No EoP CVE-2026-58595 Microsoft Bing App for IOS Spoofing Vulnerability Important 8.1 No No Spoofing CVE-2026-49162 Microsoft Brokering File System Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50305 Microsoft Brokering File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50361 Microsoft Brokering File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50466 Microsoft Brokering File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50458 Microsoft Brokering File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50658 Microsoft Defender for Endpoint for Mac Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-56178 Microsoft Defender for Endpoint for Mac Elevation of Privilege Vulnerability Important 5.5 No No EoP CVE-2026-50657 Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability Important 4.7 No No Info CVE-2026-50329 Microsoft DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58541 Microsoft DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58596 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability Important 8.3 No No EoP CVE-2026-57991 Microsoft Edge (Chromium-based) Information Disclosure Vulnerability Important 7.4 No No Info CVE-2026-58291 Microsoft Edge (Chromium-based) Information Disclosure Vulnerability Important 6.1 No No Info CVE-2026-57981 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-57984 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-57985 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 7.6 No No RCE CVE-2026-57986 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-57988 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 7.1 No No RCE CVE-2026-57992 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-58276 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-56645 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-57974 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-57975 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-58281 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 8.3 No No RCE CVE-2026-58284 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 8.3 No No RCE CVE-2026-58285 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 8.3 No No RCE CVE-2026-58287 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 8.3 No No RCE CVE-2026-58288 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 8.3 No No RCE CVE-2026-58289 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 9 No No RCE CVE-2026-58290 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-58292 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-58293 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 8.1 No No RCE CVE-2026-58294 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-57983 Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability Important 8.7 No No SFB CVE-2026-58295 Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability Important 8.3 No No SFB CVE-2026-58525 Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability Important 8.2 No No SFB CVE-2026-57987 Microsoft Edge (Chromium-based) Spoofing Vulnerability Important 6.5 No No Spoofing CVE-2026-58278 Microsoft Edge (Chromium-based) Spoofing Vulnerability Important 5.4 No No Spoofing CVE-2026-56646 Microsoft Edge (Chromium-based) Spoofing Vulnerability Important 6.5 No No Spoofing CVE-2026-57977 Microsoft Edge (Chromium-based) Spoofing Vulnerability Important 7.1 No No Spoofing CVE-2026-57993 Microsoft Edge (Chromium-based) Spoofing Vulnerability Important 7.4 No No Spoofing CVE-2026-58282 Microsoft Edge (Chromium-based) Spoofing Vulnerability Important 8.1 No No Spoofing CVE-2026-58283 Microsoft Edge (Chromium-based) Spoofing Vulnerability Important 8.1 No No Spoofing CVE-2026-58286 Microsoft Edge (Chromium-based) Spoofing Vulnerability Important 8.1 No No Spoofing CVE-2026-58298 Microsoft Edge (Chromium-based) Spoofing Vulnerability Important 7.2 No No Spoofing CVE-2026-58524 Microsoft Edge (Chromium-based) Spoofing Vulnerability Important 5.4 No No Spoofing CVE-2026-58296 Microsoft Edge for Android Information Disclosure Vulnerability Important 7.1 No No Info CVE-2026-58297 Microsoft Edge for Android Information Disclosure Vulnerability Important 7.1 No No Info CVE-2026-58300 Microsoft Edge for Android Information Disclosure Vulnerability Important 6.2 No No Info CVE-2026-58522 Microsoft Edge for Android Information Disclosure Vulnerability Important 6.8 No No Info CVE-2026-58299 Microsoft Edge for Android Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-58523 Microsoft Edge for Android Security Feature Bypass Vulnerability Important 6.5 No No SFB CVE-2026-50678 Microsoft Excel Information Disclosure Vulnerability Important 6.6 No No Info CVE-2026-54988 Microsoft Excel Information Disclosure Vulnerability Important 6.1 No No Info CVE-2026-48580 Microsoft Excel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50408 Microsoft Excel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55046 Microsoft Excel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55138 Microsoft Excel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55054 Microsoft Excel Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-55122 Microsoft Excel Information Disclosure Vulnerability Important 7.1 No No Info CVE-2026-55898 Microsoft Excel Information Disclosure Vulnerability Important 6.1 No No Info CVE-2026-50675 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55899 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55948 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-58618 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-47642 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55024 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55025 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55031 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55048 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55029 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55039 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55136 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55141 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55036 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55044 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55037 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55058 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55137 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55053 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55131 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-54131 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55947 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55949 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-56156 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55006 Microsoft Exchange Server Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-55009 Microsoft Exchange Server Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-55005 Microsoft Exchange Server Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-56642 Microsoft Fabric Data Warehouse Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-50343 Microsoft Install Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50439 Microsoft Message Queuing Queue Manager Remote Code Execution Vulnerability Important 8.1 No No RCE CVE-2026-58537 Microsoft NAT Helper Components (ipnathlp.dll) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-56193 Microsoft Office Information Disclosure Vulnerability Important 7.1 No No Info CVE-2026-55023 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55026 Microsoft Office Information Disclosure Vulnerability Important 6.2 No No Info CVE-2026-55027 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55028 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55047 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55035 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55057 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55121 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55042 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55139 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50665 Microsoft Office Information Disclosure Vulnerability Important 7.8 No No Info CVE-2026-56192 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-56195 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-47290 Microsoft Office Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50301 Microsoft Office Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55017 Microsoft Office Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55125 Microsoft Office Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55133 Microsoft OneNote Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-58636 Microsoft PC Manager Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50438 Microsoft PC Manager Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-58647 Microsoft PowerBI Report Server Spoofing Vulnerability Important 8 No No Spoofing CVE-2026-55052 Microsoft SharePoint Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-58277 Microsoft SharePoint Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-55051 Microsoft SharePoint Server Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-54108 Microsoft SharePoint Server Spoofing Vulnerability Important 6.5 No No Spoofing CVE-2026-55016 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No Spoofing CVE-2026-55019 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No Spoofing CVE-2026-55020 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No Spoofing CVE-2026-55021 Microsoft SharePoint Server Spoofing Vulnerability Important 7.3 No No Spoofing CVE-2026-55030 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No Spoofing CVE-2026-55034 Microsoft SharePoint Server Spoofing Vulnerability Important 7.3 No No Spoofing CVE-2026-55126 Microsoft SharePoint Server Spoofing Vulnerability Important 7.3 No No Spoofing CVE-2026-55135 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No Spoofing CVE-2026-56157 Microsoft SharePoint Server Spoofing Vulnerability Important 5.4 No No Spoofing CVE-2026-47296 Microsoft SQL Server Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-55002 Microsoft SQL Server Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-47295 Microsoft SQL Server Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-50468 Microsoft SQL Server Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-54116 Microsoft SQL Server Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-42900 Microsoft Windows App Store Elevation of Privilege Vulnerability Important 8.1 No No EoP CVE-2026-49784 Microsoft Windows App Store Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50356 Microsoft Windows App Store Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-49165 Microsoft Windows App Store Information Disclosure Vulnerability Important 7.1 No No Info CVE-2026-54993 Microsoft Windows Media Foundation Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-58610 Microsoft Windows Media Foundation Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55050 Microsoft Word Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55124 Microsoft Word Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55142 Microsoft Word Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-55032 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55055 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55038 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55134 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55128 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-55130 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50359 Microsoft XML Core Services Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-57097 Microsoft XML Security Feature Bypass Vulnerability Important 6.4 No No SFB CVE-2026-50346 Netlogon RPC Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50402 NTFS Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50506 OData for ASP.NET and ASP.NET Core Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-45646 OData for ASP.NET and ASP.NET Core Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-54989 Quality Windows Audio/Video Experience (QWAVE) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50365 Remote Access Management service/API (RPC server) Elevation of Privilege Vulnerability Important 8 No No EoP CVE-2026-54990 Remote Desktop Client Remote Code Execution Vulnerability Important 9.8 No No RCE CVE-2026-58594 Remote Desktop Client Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-56190 Remote Desktop Protocol Remote Code Execution Vulnerability Important 9.8 No No RCE CVE-2026-49783 Secure Boot Security Feature Bypass Vulnerability Important 7.8 No No SFB CVE-2026-42990 SQL Server ODBC driver Elevation of Privilege Vulnerability Important 9.8 No No EoP CVE-2026-49168 Storage Spaces Direct Elevation of Privilege Vulnerability Important 6.2 No No EoP CVE-2026-48581 Surface Broker SDMA Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-49180 Universal Plug and Play (upnp.dll) Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50455 Universal Plug and Play (upnp.dll) Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-54111 Universal Print Management Service Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-58543 Universal Print Management Service Elevation of Privilege Vulnerability Important 6.3 No No EoP CVE-2026-58601 Virtual Hard Disk (VHD) Miniport Driver Elevation of Privilege Vulernability Important 7.8 No No EoP CVE-2026-50520 Visual Studio Code Remote Code Execution Vulnerability Important 8.4 No No RCE CVE-2026-45496 Visual Studio Code Security Feature Bypass Vulnerability Important 5.5 No No SFB CVE-2026-57101 Visual Studio Code Security Feature Bypass Vulnerability Important 7.1 No No SFB CVE-2026-57102 Visual Studio Code Security Feature Bypass Vulnerability Important 8.8 No No SFB CVE-2026-47305 Visual Studio Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-49805 Win32k Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50297 Win32k Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50325 Win32k Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50489 Win32k Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-57095 Win32k Elevation of Privilege Vulnerability Important 6.2 No No EoP CVE-2026-50416 Win32k Information Disclosure Vulnerability Important 3.3 No No Info CVE-2026-56184 Win32k Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50432 Window Virtual Filtering Platform (VFP) Denial of Service Vulnerability Important 5.3 No No DoS CVE-2026-54119 Windows Active Directory Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-57976 Windows Active Directory Domain Services Denial of Service Vulnerability Important 6.5 No No DoS CVE-2026-50366 Windows Active Directory Domain Services Denial of Service Vulnerability Important 6.5 No No DoS CVE-2026-49178 Windows Active Directory Domain Services Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-58529 Windows Active Directory Federation Services (ADFS) Information Disclosure Vulnerability Important 7.1 No No Info CVE-2026-54983 Windows Active Directory Federation Services Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50695 Windows Active Directory Federation Services Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50304 Windows Active Directory Federation Services Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50368 Windows Active Directory Federation Services Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50324 Windows Active Directory Federation Services Denial of Service Vulnerability Important 5.9 No No DoS CVE-2026-50355 Windows Active Directory Federation Services Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50411 Windows Active Directory Federation Services Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-58631 Windows Admin Center (WAC) Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-56196 Windows Admin Center (WAC) Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-56197 Windows Admin Center (WAC) Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-56169 Windows Admin Center Elevation of Privilege Vulnerability Important 8.1 No No EoP CVE-2026-57107 Windows Admin Center Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-56185 Windows Admin Center Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-50312 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 4.7 No No EoP CVE-2026-50462 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-57093 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-34346 Windows Ancillary Function Driver for WinSock Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-48572 Windows App Package Installer Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-48571 Windows App Package Installer Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50400 Windows App Package Installer Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50331 Windows Application Model Core API Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-49803 Windows AppX Deployment Extensions Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50351 Windows Audio Compression Manager (ACM) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50440 Windows Audio Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34328 Windows Audio Service Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50406 Windows Backup Engine Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50364 Windows Backup Service Elevation of Privilege Vulnerability Important 7.3 No No EoP CVE-2026-42975 Windows Bluetooth Port Driver Remote Code Execution Important 8 No No RCE CVE-2026-58538 Windows Bluetooth Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58638 Windows Boot Loader Security Feature Bypass Vulnerability Important 6 No No SFB CVE-2026-58637 Windows Client-Side Caching Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50384 Windows Clip Service Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-49183 Windows Clipboard Server Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50689 Windows Clipboard Server Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50374 Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability Important 6.3 No No EoP CVE-2026-58536 Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58613 Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50401 Windows Cloud Files Mini Filter Driver Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50697 Windows Common Log File System Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50667 Windows Common Log File System Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50421 Windows Connected User Experiences and Telemetry Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50428 Windows Container Isolation FS Filter Driver (unionfs.sys) Information Disclosure Vulnerability Important 7.1 No No Info CVE-2026-50352 Windows Cryptographic Services Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50302 Windows Cryptographic Services Security Feature Bypass Vulnerability Important 4.2 No No SFB CVE-2026-55144 Windows Cryptography API: Next Generation (CNG) Tampering Vulnerability Important 7.1 No No Tampering CVE-2026-50347 Windows Data.dll Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-49181 Windows DHCP Client Elevation of Privilege Vulnerability Important 7.5 No No EoP CVE-2026-50683 Windows DHCP Client Elevation of Privilege Vulnerability Important 8 No No EoP CVE-2026-58627 Windows DHCP Server Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50685 Windows DHCP Server Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-49807 Windows DirectX Information Disclosure Vulnerability Important 6.2 No No Info CVE-2026-49175 Windows DNS Client Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50487 Windows DNS Client Elevation of Privilege Vulnerability Important 8.1 No No EoP CVE-2026-50465 Windows DNS Client Tampering Vulnerability Important 7.1 No No Tampering CVE-2026-49169 Windows DNS Server Remote Code Execution Vulnerability Important 8 No No RCE CVE-2026-50426 Windows DNS Server Remote Code Execution Vulnerability Important 6.8 No No RCE CVE-2026-50424 Windows Domain Controller Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-50300 Windows DWM Core Library Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50437 Windows DWM Core Library Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-34348 Windows Event Logging Service Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-50502 Windows Event Logging Service Remote Code Execution Vulnerability Important 8 No No RCE CVE-2026-33842 Windows File Explorer Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-40422 Windows File Explorer Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-41087 Windows File Explorer Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50473 Windows File Explorer Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50442 Windows File Explorer Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50389 Windows File Explorer Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50456 Windows File Explorer Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-57084 Windows File Explorer Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-57091 Windows File History Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50405 Windows Filtering Platform Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-49172 Windows FTP Service Remote Code Execution Vulnerability Important 9.8 No No RCE CVE-2026-50387 Windows GDI Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-54122 Windows GDI+ Remote Code Execution Vulnerability Important 8.4 No No RCE CVE-2026-50483 Windows Graphics Component Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-58609 Windows Graphics Component Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50391 Windows Group Policy Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50310 Windows Human Interface Device Information Disclosure Vulnerability Important 4.7 No No Info CVE-2026-50485 Windows Hyper-V Denial of Service Vulnerability Important 4.5 No No DoS CVE-2026-54129 Windows Hyper-V Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50315 Windows Image Acquisition Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58534 Windows Input Method Editor (IME) Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-50490 Windows Installer Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-58540 Windows Installer Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50425 Windows Internal System User Profile Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50293 Windows Internal Task Bar Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-49167 Windows Kernel Elevation of Privilege Vulnerability Important 4.7 No No EoP CVE-2026-49173 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-54132 Windows Kernel Elevation of Privilege Vulnerability Important 6.8 No No EoP CVE-2026-49795 Windows Kernel Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-49798 Windows Kernel Elevation of Privilege Vulnerability Important 9.3 No No EoP CVE-2026-49808 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50354 Windows Kernel Elevation of Privilege Vulnerability Important 7.1 No No EoP CVE-2026-50332 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50377 Windows Kernel Elevation of Privilege Vulnerability Important 5.5 No No EoP CVE-2026-50390 Windows Kernel Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50423 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50397 Windows Kernel Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50436 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50399 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50459 Windows Kernel Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50477 Windows Kernel Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-50478 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50484 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50673 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58532 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50294 Windows Kernel Information Disclosure Vulnerability Important 6.2 No No Info CVE-2026-50316 Windows Kernel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50419 Windows Kernel Information Disclosure Vulnerability Important 3.3 No No Info CVE-2026-50463 Windows Kernel Information Disclosure Vulnerability Important 7.5 No No Info CVE-2026-50475 Windows Kernel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50429 Windows Kernel Information Disclosure Vulnerability Important 8.2 No No Info CVE-2026-58614 Windows Kernel Security Feature Bypass Vulnerability Important 5.5 No No SFB CVE-2026-58545 Windows Kernel Security Feature Bypass Vulnerability Important 5.5 No No SFB CVE-2026-58602 Windows Kernel-Mode Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50393 Windows Kernel-Mode Driver Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50396 Windows Kernel-Mode Driver Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50378 Windows Key Guard Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50303 Windows Key Guard Security Feature Bypass Vulnerability Important 5.5 No No SFB CVE-2026-40378 Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-49799 Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability Important 6.5 No No DoS CVE-2026-50371 Windows LUA File Virtualization Filter Driver Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-58544 Windows Management Services Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50404 Windows Media Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50358 Windows Media Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50336 Windows Media Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50398 Windows Media Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-50414 Windows Media Elevation of Privilege Vulnerability Important 7.5 No No EoP CVE-2026-50379 Windows Media Elevation of Privilege Vulnerability Important 7.5 No No EoP CVE-2026-50433 Windows Media Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50676 Windows Media Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50677 Windows Media Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34349 Windows Media Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50394 Windows Media Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50415 Windows Media Information Disclosure Vulnerability Important 5.3 No No Info CVE-2026-57083 Windows Media Photo Codec Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-54115 Windows Message Queuing (MSMQ) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50447 Windows Message Queuing Service (MSMQ) Remote Code Execution Vulnerability Important 9.8 No No RCE CVE-2026-50505 Windows Message Queuing Service (MSMQ) Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-50342 Windows MIDI Service Module Elevation of Privileges Vulnerability Important 8.8 No No EoP CVE-2026-56183 Windows MIDI Service Module Elevation of Privileges Vulnerability Important 7 No No EoP CVE-2026-56187 Windows MIDI Service Module Elevation of Privileges Vulnerability Important 7 No No EoP CVE-2026-58635 Windows Narrator Braille Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50500 Windows Netlogon Elevation of Privilege Vulnerability Important 7.5 No No EoP CVE-2026-50476 Windows Network Connections Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50450 Windows Network Connections Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-56650 Windows Network File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-56649 Windows Network File System Remote Code Execution Vulnerability Important 5.9 No No RCE CVE-2026-50470 Windows Network Policy Server SNMP Information Disclosure Vulnerability Important 7.5 No No Info CVE-2026-50496 Windows Network Policy Server SNMP Information Disclosure Vulnerability Important 7.5 No No Info CVE-2026-56194 Windows NFS Server Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-56648 Windows NFS Server Elevation of Privilege Vulnerability Important 7.5 No No EoP CVE-2026-50337 Windows Notification Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-49789 Windows NTFS Elevation of Privilege Vulnerability Important 7.3 No No EoP CVE-2026-50412 Windows NTFS Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50422 Windows NTFS Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50672 Windows NTFS Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-56175 Windows NTFS Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-56182 Windows NTFS Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50341 Windows NTFS Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-58640 Windows NTFS Remote Code Execution Vulnerability Important 7.3 No No RCE CVE-2026-49184 Windows NTFS Remote Code Execution Vulnerability Important 8.4 No No RCE CVE-2026-49797 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50308 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50386 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50309 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50313 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50388 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50448 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50471 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50461 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50417 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50482 Windows NTFS Remote Code Execution Vulnerability Important 7.3 No No RCE CVE-2026-50494 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50344 Windows OLE Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50686 Windows OLE Remote Code Execution Vulnerability Important 8.1 No No RCE CVE-2026-50335 Windows Operating Systems Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50317 Windows Operating Systems Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-54987 Windows Overlay Filter Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50435 Windows Overlay Filter Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50409 Windows Overlay Filter Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-40400 Windows PowerShell Remote Code Execution Vulnerability Important 8 No No RCE CVE-2026-49166 Windows Print Configuration Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-55004 Windows Print Configuration Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50499 Windows Print Spooler Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50383 Windows Print Spooler Information Disclosure Vulnerability Important 6.1 No No Info CVE-2026-57085 Windows Print Spooler Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50469 Windows Projected File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50434 Windows Push Notification Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50339 Windows Push Notification Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50430 Windows Push Notification Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50334 Windows Push Notification Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-44800 Windows Push Notifications Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50363 Windows Push Notifications Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50431 Windows Quality of Service (QoS) Packet Scheduler Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50372 Windows Redirected Drive Buffering System Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50666 Windows Remote Access Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-56647 Windows Remote Access Service Infrastructure Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-50330 Windows Remote Desktop Client Elevation of Privilege Vulnerability Important 7.5 No No EoP CVE-2026-50376 Windows Remote Desktop Client Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-50504 Windows Remote Desktop Client Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-58533 Windows Remote Desktop Client Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-58535 Windows Remote Desktop Client Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-58546 Windows Remote Desktop Client Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-58539 Windows Remote Desktop Client Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-55003 Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-57979 Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-50445 Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-50497 Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-54126 Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-57982 Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-50369 Windows Remote Desktop Services Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-58626 Windows Remote Desktop Services Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-55014 Windows Remote Help Defense Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50318 Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50407 Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50357 Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50441 Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50668 Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability Important 6.8 No No EoP CVE-2026-54109 Windows Resilient File System (ReFS) Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-49792 Windows Resilient File System (ReFS) Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-49793 Windows Resilient File System (ReFS) Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50362 Windows Resilient File System (ReFS) Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50492 Windows Resilient File System (ReFS) Remote Code Execution Vulnerability Important 6.8 No No RCE CVE-2026-50501 Windows Resilient File System (ReFS) Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-58530 Windows Resilient File System (ReFS) Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-49791 Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability Important 7.1 No No EoP CVE-2026-50451 Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability Important 7.1 No No EoP CVE-2026-57096 Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50323 Windows Runtime Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50452 Windows Runtime Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50348 Windows Runtime Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50345 Windows Runtime Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50322 Windows Runtime Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50340 Windows Runtime Elevation of Privilege Vulnerability Important 8.5 No No EoP CVE-2026-50410 Windows Runtime Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50449 Windows Runtime Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50460 Windows Runtime Elevation of Privilege Vulnerability Important 8.1 No No EoP CVE-2026-50403 Windows Runtime Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50385 Windows Runtime Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-50413 Windows Runtime Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-50457 Windows Runtime Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50486 Windows Runtime Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50503 Windows Runtime Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-54125 Windows Runtime Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58527 Windows Runtime Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50373 Windows Search Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50679 Windows Search Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-44806 Windows Secure Channel Denial of Service Vulnerability Important 5.3 No No DoS CVE-2026-50681 Windows Secure Channel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-56186 Windows Secure Channel Information Disclosure Vulnerability Important 8.1 No No Info CVE-2026-50367 Windows Sensor Data Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58619 Windows Sensor Data Service Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50311 Windows Server Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50328 Windows Server Update Service (WSUS) Tampering Vulnerability Important 7.5 No No Tampering CVE-2026-58531 Windows SMB Elevation of Privilege Vulnerability Important 7.5 No No EoP CVE-2026-54997 Windows SMB Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-49801 Windows SMB Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50690 Windows SMB Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-56168 Windows SMB Server Denial of Service Vulnerability Important 6.5 No No DoS CVE-2026-50360 Windows SMB Server Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-57089 Windows SMB Server Network Transport Driver (srvnet.sys) Remote Code Execution Vulnerability Important 7.5 No No RCE CVE-2026-50333 Windows Spaceport.sys Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50298 Windows Spaceport.sys Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-49171 Windows Speech Runtime Elevation of Privilege Vulnerability Important 7.5 No No EoP CVE-2026-49170 Windows StateRepository API Server file Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58526 Windows Storage Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50299 Windows Storage Spaces Direct Remote Code Execution Vulnerability Important 6.8 No No RCE CVE-2026-57968 Windows Subsystem for Linux (WSL2) Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-57973 Windows Subsystem for Linux (WSL2) Kernel Tampering Vulnerability Important 6.3 No No Tampering CVE-2026-50418 Windows System Secure Feature Bypass Vulnerability Important 5.1 No No SFB CVE-2026-50306 Windows TCP/IP Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50307 Windows TCP/IP Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-49177 Windows TCP/IP Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50669 Windows Telephony Server Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-54124 Windows Terminal Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-50350 Windows Trusted Runtime Interface Driver Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-50326 Windows Unified Consent System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-49790 Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability Important 7.3 No No EoP CVE-2026-50498 Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58547 Windows Universal Plug and Play (UPnP) Device Host Elevation of Privilege Vulnerability Important 5.5 No No EoP CVE-2026-49794 Windows USB Audio Class Driver Information Disclosure Vulnerability Important 4.6 No No Info CVE-2026-50453 Windows USB Audio Class Driver Information Disclosure Vulnerability Important 6.1 No No Info CVE-2026-58528 Windows USB Audio Class Driver Information Disclosure Vulnerability Important 6.8 No No Info CVE-2026-50321 Windows USB Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50479 Windows USB Hub Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-55000 Windows USB Print Driver Elevation of Privilege Vulnerability Important 6.4 No No EoP CVE-2026-54991 Windows USB Print Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-54996 Windows USB Print Driver Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-49802 Windows USB Print Driver Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-49806 Windows USB Print Driver Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-50674 Windows USB Print Driver Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-49804 Windows USB Video Driver Elevation of Privilege Vulnerability Important 6.6 No No EoP CVE-2026-50454 Windows User Interface Core Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-49176 Windows WalletService Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-49800 Windows Web Proxy Auto-Discovery Protocol (WPAD) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50480 Windows Web Proxy Auto-Discovery Protocol (WPAD) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-56173 Windows WebView Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-58632 Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-54107 Windows Win32k Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-54986 Windows Win32k Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-54112 Windows Win32k Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-54114 Windows Win32k Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50670 Windows Win32k Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-50688 Windows Win32k Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50687 Windows Win32k Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-56176 Windows Win32k Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-58628 Windows Wireless Network Manager Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-50295 Windows Zero Trust DNS Security Feature Bypass Vulnerability Important 5.5 No No SFB CVE-2026-50509 Wireless Wide Area Network Service (WwanSvc) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-55945 Microsoft Edge (Chromium-based) Information Disclosure Vulnerability Moderate 4.2 No No Info CVE-2026-45488 Microsoft Edge (Chromium-based) Spoofing Vulnerability Moderate 5.4 No No Spoofing CVE-2026-45489 Microsoft Edge (Chromium-based) Spoofing Vulnerability Moderate 6.5 No No Spoofing CVE-2026-55145 Outlook Copilot Tampering Vulnerability Moderate 6.3 No No Tampering CVE-2026-56181 Windows Network Address Translation (NAT) Spoofing Vulnerability Moderate 8.3 No No Spoofing CVE-2026-58597 Microsoft Edge (Chromium-based) Spoofing Vulnerability Low 4.3 No No Spoofing

** Indicates this CVEs has already been resolved by Microsoft, and no further action is needed by the end user.

 

 

I’ll do my best to summarize everything else in this release, but no promises. I’m only human after all.

 

Looking at the remaining Critical-rated patches, Office is its own weather system: fourteen Word/Excel/PowerPoint/Office RCEs clustered at CVSS 7.8, plus five Windows Media Foundation RCEs. Outside of the Preview Pane attack vector, they are individually unremarkable; collectively, patch Office and reboot. Always reboot. We’ve already mentioned DHCP some, but DHCP Server can't catch a break. Beyond the one already covered, add CVE-2026-56159, CVE-2026-48564, CVE-2026-50370, and DHCP Client cousin CVE-2026-54128. Five DHCP RCEs in one release. Rounding things out, Print Spooler (CVE-2026-58608), Windows TCP/IP (CVE-2026-54999), and a SQL Server RCE pair (CVE-2026-54117/54118) all receive patches, and all are rated a CVSS 8.8. VE-2026-55944 (Dynamics NAV/Business Central On-Prem RCE, 9.8) is the same deserialization flavor as the SharePoint pair; it’s unauthenticated, network-reachable, and easy to overlook since it's not SharePoint. CVE-2026-48561 (Microsoft Copilot RCE, 9.6) and CVE-2026-50380 (Windows GDI+ RCE, 9.6) round out the near-top tier. Don't forget CVE-2026-55040, a SharePoint Security Feature Bypass (9.1) — patch it in the same pass as the SharePoint RCE pair since it's the same product family. Identity and infrastructure get hit too: CVE-2026-54121 (AD Certificate Services EoP, 8.8) and CVE-2026-50444 (WSUS EoP, 8.8). The obscure Reliable Multicast Transport Driver (RMCAST) takes two RCEs (CVE-2026-54982, CVE-2026-54995), and CVE-2026-50474 gives Remote Desktop Client its own RCE, separate from the RDP one already covered. The rest is a long tail: Defender RCE x2, GDI+ again, Windows Media x2, Secure Kernel Mode EoP x2, and a second Hyper-V EoP. You can consider these “normal” as far as patch cadence goes.

That leaves us with 95 RCE to discuss. I would explain, but there is too much, so let me sum up. CVE-2026-55944 (Dynamics NAV/Business Central On-Prem, 9.8) is the same deserialization flavor as the SharePoint pair: unauthenticated, easy to miss since it's not SharePoint. CVE-2026-54990 (Remote Desktop Client), CVE-2026-49172 (Windows FTP Service), and CVE-2026-50447 (MSMQ) all hit 9.8 too, proof severity labels lag CVSS sometimes. CVE-2026-48561 (Copilot) and CVE-2026-50380 (GDI+) sit at 9.6.

The pattern worth watching: 14 Windows NTFS and 7 ReFS RCEs/ That makes 21 filesystem-driver bugs, an unusually large cluster suggesting a shared root cause. Microsoft Edge (Chromium-based) contributes 21 more that are genuinely Microsoft's to patch, not Chromium re-listing noise. Remote Desktop Client racks up a second and third RCE (CVE-2026-50474, CVE-2026-58594), and Windows Admin Center picks up two (CVE-2026-56196/56197) — WAC exposure keeps creeping into these releases. Exchange Server (CVE-2026-55005) and AD Domain Services (CVE-2026-49178) both land at 8.8.

And because this release wouldn't be complete without it: CVE-2026-50663, an RCE in Age of Empires II: Definitive Edition. Yes, really. Patch your civilization anyway.

There are close to 260 EoP bugs in this month’s release. Microsoft could have just published the EoPs and still had a record-setting month. As usual, most simply lead to local attackers executing their code at SYSTEM-level privileges or administrative privileges, so there’s not much to add without further technical details about the bugs themselves. What’s really frustrating is that 94 have no explicit privilege statement at all. Microsoft just says “elevate privileges” with no detail. By my count, that leaves around 25 bugs to consider. Some don’t elevate at all. The FAQ literally says the attacker just gets “the rights of the user running the affected application.” That covers Win32k, Clip Service, Search Service, MSMQ, and SharePoint. A few get a Low-to-Medium integrity bump. There are also a couple that lead to downgraded service accounts or arbitrary file deletion, but nothing else I’ve seen really stands out too much.

There are 20 Security Feature Bypass (SFB) bugs this month, and it's a genuinely mixed bag. CVE-2026-55040 leads at Critical, CVSS 9.1 as it’s weak authentication in SharePoint Server. Patch it in the same pass as the SharePoint RCE pair since it's the same product. The AI-coding-tool trend continues: GitHub Copilot and Visual Studio Code and Visual Studio all land SFB bugs, mostly injection or path-traversal flavored. BitLocker is this month's lone publicly disclosed bug. It’s not exploited yet, but public disclosure is a countdown clock, not a free pass. It requires physical access, as does the bug in Microsoft XML. The firmware/boot cluster is worth a second look: Secure Boot, Boot Loader, and Key Guard all touch the trust chain below the OS. Meaning, despite a low CVSS score, “if this fails, nothing above it can be trusted” stakes. Rounding out the SFB patches, there are two .NET SFBs, two Windows Kernel SFBs, and a DNS/Cryptographic Services bringing up the rear.

The July release includes 31Spoofing bugs this month, and we’ve already covered the most important (Exchange). SharePoint Server accounts for another ten with almost all the same root cause: stored XSS letting an authenticated attacker spoof content in the browser. Microsoft Edge (Chromium-based) contributes fifteen more spanning access-control failures, SSRF, type confusion, and UI misrepresentation. All genuinely Microsoft's to patch, not re-listed Chromium noise. The remaining six round out the usual suspects: a Windows NAT spoofing bug reachable from an adjacent network, a Bing app flaw on iOS, a PowerBI Report Server XSS issue, a .NET output-encoding bug, and an AD FS spoofing flaw. None publicly disclosed, none exploited, but with SharePoint's history this year, don't let "just Spoofing" lull you into deprioritizing the patch cycle.

Of 111 Information Disclosure bugs, the overwhelming majority of these simply result in info leaks consisting of unspecified memory contents or memory addresses. GitHub Copilot is the standout. Here, the bug insufficiently protected credentials, meaning actual secrets leak, not memory scraps. The Windows Admin Center flaw discloses data via improper authentication. A management console leaking to an unauthorized party is a bigger deal than it sounds. SharePoint uses SSRF to pull data server-side, and the Event Logging Service is a protection-mechanism failure, not a memory bug at all. Edge picks up three genuinely file-system-flavored disclosures — improper authorization, files/directories accessible to external parties, and link-following — plus Edge for Android exposing “private personal information” twice and two path-traversal bugs. The remaining 40+ are mostly one-line “exposure of sensitive information to an unauthorized actor” entries scattered across File Explorer, Push Notifications, Cryptographic Services, and Win32k.

Only 8 Tampering bugs this month, the smallest bucket, but a couple stand out. The top of the list is a WSUS bug, caused by an uncaught exception that lets an unauthenticated attacker tamper with the update service over the network. That’s your patch-management infrastructure itself being the target, which always deserves extra attention. Windows CNG (the crypto API) picks up a missing-cryptographic-step flaw, and Windows DNS Client shows up three separate times across the list, twice for improper access control and once for missing authentication on a critical function. DNS resolution having this many tampering paths in one release is worth flagging as a pattern rather than three unrelated bugs. The one genuinely different entry is Outlook Copilot, described simply as vulnerable to “malicious uses” enabling tampering over the network. That’s a fantastically vague phrasing for an AI-assistant feature, continuing this year's running theme of Copilot-branded features showing up somewhere in every release. Finally, a .NET link-following bug and a WSL2 kernel race condition receive patches. Both require local/authorized access to trigger.

Still with me? Good, because we have 35 DoS bugs to cover, and this is really an identity-infrastructure story more than a grab-bag. Active Directory Federation Services alone accounts for seven of them, all sitting at CVSS 7.5, all stack-based buffer overflows or infinite loops that let an unauthenticated attacker knock the service over the network. The .NET ecosystem is the other big cluster: .NET, .NET Framework, and ASP.NET Core/OData contribute nine bugs combined, almost all “allocation of resources without limits or throttling”.  HTTP.sys and HTTP/2 pick up the same flavor. LSASS shows up twice, which is always worth a second look given what that process actually holds. Rounding out the list are patches for Windows DHCP Server, SMB Server, Secure Channel, Hyper-V, and IKE Protocol each take a single hit, mostly requiring authorized or adjacent-network access rather than being wide open to the internet.

No new advisories are being released this month.

Looking Ahead

The next Patch Tuesday will be on August 11, just after Hacker Summer Camp in sunny Las Vegas. Should I survive the heat, I’ll be back then to give you my full thoughts on the release – no matter how large it may be. Until then, stay safe, happy patching, and may all your reboots be smooth and clean!

In this excerpt of a TrendAI Research Services vulnerability report, Yazhi Wang and Jonathan Lein of the TrendAI Research team detail a recently patched remote code execution bug in the Windows HTTP protocol stack. Successful exploitation of this vulnerability can result in a denial-of-service condition, or, in the worst case, code execution with kernel privileges. The following is a portion of their write-up covering CVE-2026-47291, with a few minimal modifications.

A remote code execution vulnerability exists in the HTTP Protocol Stack for Microsoft Internet Information Services implemented in HTTP.sys. The vulnerability is due to invalid validating incoming HTTP requests.

A remote, unauthenticated attacker can exploit this vulnerability by sending crafted HTTP packets to the target system. Successful exploitation of this vulnerability can result in a denial-of-service condition, or, in the worst case, code execution with kernel privileges.

The Vulnerability

HTTP.sys is the kernel-mode HTTP protocol driver in Microsoft Windows. It provides HTTP request parsing, response caching, and SSL/TLS termination for Internet Information Services (IIS) and other applications that register URL prefixes. The driver listens on configured TCP ports (commonly 80 for HTTP and 443 for HTTPS) and processes inbound HTTP/1.x and HTTP/2 requests at the kernel level.

When operating over HTTPS, HTTP.sys delegates TLS processing to the Windows Secure Channel (SChannel) provider. Inbound TCP data is decrypted on a per-record basis: each TLS record constitutes an independent unit of encryption and is decrypted separately by SChannel before being delivered to HTTP.sys as a distinct plaintext buffer. A single TLS 1.3 application data record has the following structure:

The decrypted payload of each TLS record is delivered independently to the HTTP parser via

UlHttpBufferReceiveEvent(), regardless of how many TLS records the underlying TCP connection coalesces into a single TCP segment. This behavior is distinct from plaintext HTTP connections, where the Windows TCP stack coalesces multiple segments into a single receive indication before the data reaches HTTP.sys.

The HTTP parser maintains a per-request state object that includes a dynamically grown buffer reference array. The capacity field stores the current number of allocated slots in the buffer reference array. The count field stores the number of slots currently in use. The ref_array_ptr field points to the dynamically allocated array of 8-byte buffer reference entries.

An integer overflow vulnerability exists in HTTP.sys. The vulnerability is due to insufficient bounds checking when growing a buffer reference array during HTTP/1.x header parsing. When HTTP.sys receives data for an HTTP/1.x request, it allocates a UL_REQUEST_BUFFER structure for each receive indication and tracks these buffers in the per-request reference array described above. The count field records the number of active buffer references, and the capacity field records the total number of allocated slots.

As the HTTP parser (UlpParseNextRequest()) processes header lines, it calls an inline buffer reference routine each time a new receive buffer is consumed. When count reaches capacity, the routine grows the array by reallocating it with five additional slots. The new allocation size is computed as 0x28 + capacity * 8, the contents of the existing array are copied via memmove using count * 8 as the copy length, and capacity is incremented by 5 as a 16-bit unsigned integer addition. No overflow check is performed on this addition.

After 13,107 growth events, capacity reaches 0xFFFB. The next growth adds 5, producing 0x10000, which truncates to 0x0000 in the 16-bit field. On the subsequent buffer reference addition, count (which is now 65,536 or greater) exceeds the zero capacity, triggering another growth. The allocation size computation 0x28 + 0 * 8 produces a 40-byte allocation, but the memmove copies count * 8 bytes (approximately 524,256 bytes) from the old buffer into the 40-byte allocation. This results in a kernel pool heap buffer overflow of over 500 kilobytes.

Each buffer reference corresponds to one receive buffer delivered to the HTTP parser. For plaintext HTTP connections, the Windows TCP stack coalesces received segments into large indications, and UlpMergeBuffers() further combines buffers within HTTP.sys. Over TLS connections, each TLS record is decrypted independently by SChannel and delivered as a separate buffer through UlHttpBufferReceiveEvent() into UlpCopyIndicatedData(). If each TLS record contains exactly one complete header line (terminated by CRLF), the HTTP parser fully consumes the buffer without setting the partial-parse flag, causing UlpAdjustBuffers() to advance to the next buffer via its non-merge path. This creates a 1:1 correspondence between TLS records sent and buffer references accumulated.

To trigger the overflow, an attacker crafts an HTTP request in which each header line is encapsulated in a separate TLS application data record. Given a minimum header line size of approximately 4 bytes and a required count of 65,536 buffer references, the total request size comes to roughly 262,144 bytes. The MaxRequestBytes registry value (at HKLM\SYSTEM\CurrentControlSet\Services\HTTP\Parameters) must be configured to a value of at least 262,144 bytes for the server to accept a request of this size. The default value of 16,384 bytes limits the request to approximately 4000 header lines, which is insufficient to trigger the overflow. As a mitigation, keeping MaxRequestBytes at or below 65,535 bytes represents the most conservative configuration to prevent this attack.

A remote unauthenticated attacker could exploit this vulnerability by sending a specially crafted HTTP/1.x request over a TLS connection to an affected server. Successful exploitation results in unexpected system termination due to a memory access exception in the context of the kernel. Under specific memory layout conditions, exploitation could result in arbitrary code execution in the context of the kernel.

Notes:

• The vulnerability is only reachable through HTTP/1.x header parsing over TLS connections. HTTP/2 and HTTP/3 use different parser paths that do not interact with the buffer reference array.

• Body data parsing (Content-Length or chunked transfer encoding) does not add entries to the buffer reference array. Only header parsing triggers buffer reference growth.

• At a sending rate of 10 milliseconds per TLS record, the overflow requires approximately 11 minutes to trigger.

Source Code Walkthrough

The following code snippet was taken from HTTP.sys version 10.0.26100.7705. Comments added by TrendAI Research have been highlighted.

In UlpParseNextRequest():

Detection Guidance

To detect an attack exploiting this vulnerability, the detection device must monitor and parse traffic on the TCP port 443.

The traffic on the affected port(s) is TLS-encrypted. The detection device must be able to decrypt the TLS traffic before applying the following detection method. The detection device should monitor for HTTPS connections.

An HTTP/1.x request [1] consists of a request line followed by zero or more header field lines, each terminated by CRLF. The following grammar defines the relevant structure:

Decrypted traffic inspection:

After decrypting the TLS session, the detection device must parse the HTTP/1.x request headers. The detection device must count the number of distinct header field lines present in a single HTTP request. If the number of header field lines in a single request exceeds 1,000, the traffic should be considered suspicious; an attack exploiting this vulnerability is likely underway.

Encrypted traffic heuristics:

Where decryption is not available, the detection device should inspect the pattern of TLS application data records within the encrypted session. If each TLS application data record contains a single short payload and the total number of such records on a single connection exceeds 1,000, the traffic should be considered suspicious; an attack exploiting this vulnerability is likely underway.

Notes:

• The preferred detection method (header line count) requires the ability to decrypt TLS traffic, for example through TLS inspection, a decrypting proxy, or possession of the server's private key. This method directly observes the attack indicator and produces low false-positive and false-negative rates.

• The TLS record heuristic operates on encrypted traffic and does not require decryption. This method is more prone to false positives (legitimate applications that send many small TLS records, such as interactive streaming sessions, may trigger the heuristic) and to false negatives (the threshold is based on observable record sizes rather than the actual header count that determines exploitability). Where possible, decrypted traffic inspection should be preferred.

• The attack requires approximately 11 minutes of sustained connection to accumulate sufficient header lines. Connection duration monitoring may serve as a supplementary detection heuristic.

Conclusion

This vulnerability was patched by Microsoft in the June 2026 release cycle. They note several mitigations that include editing the registry to ensure unpatched systems are not vulnerable to exploitation. However, the best method to ensure this bug has been fully remediated is to test and deploy the vendor-supplied patch.

Special thanks to Yazhi Wang and Jonathan Lein of the TrendAI Research team for providing such a thorough analysis of this vulnerability. For an overview of TrendAI Research services, please visit https://go.trendmicro.com/tis/vulnerabilities.html.

The threat research team will be back with other great vulnerability analysis reports in the future. Until then, follow the team on Twitter, Mastodon, LinkedIn, or Bluesky for the latest in exploit techniques and security patches.

We’re back with our look at the Apple macOS and iOS security updates. As this is a new feature for us, please let us know your feedback on the blog.

For June 2026, Apple released 37 unique CVEs across iOS 26.5.2 / iPadOS 26.5.2, macOS Tahoe 26.5.2, Safari 26.5.2. Since Apple doesn’t provide CVSS scores or other severity information, we’re left to speculate on which of these bugs is the most severe. The overwhelming majority (31 of 37) are WebKit/WebRTC bugs reachable through malicious web content. Most of those are crash/DoS bugs rather than code execution, so the real risk lives in the small set of kernel bugs and the handful of WebKit sandbox escapes. However, there are a couple that stand out.

-    CVE-2026-43724 (Kernel) – According to Apple, “An app may be able to cause unexpected system termination or write kernel memory.” A kernel memory write is the highest-value primitive here: it's the privilege-escalation half of a full exploit chain and leads to complete device control. The bug was credited to Hyunwoo Kim (@v4bel), who is known to be a serious kernel researcher.

-    CVE-2026-39868 (Kernel) – Another kernel bug, this one could “cause unexpected system termination or corrupt kernel memory.” This is kernel memory corruption, and notably credited to a roster of elite offensive researchers (STAR Labs, Positive Technologies, Baidu Security). This kind of attribution usually signals a weaponizable, possibly Pwn2Own-grade bug rather than a theoretical crash.

-    CVE-2026-43725 / CVE-2026-43701 (WebKit) – Apple states these bugs could allow a website to process restricted web content outside the sandbox. I'm flagging this sandbox-escape pair over the many WebKit crash bugs because a sandbox escape is the bridge that turns a web-content bug into a path toward the kernel issues above. It's the most dangerous remotely-triggered class in the release.

Here’s a look at all the bugs released by Apple this month:

Apple Security Update – June 29, 2026 37Total CVEs 22Denial of Service 7Information Disclosure 3Memory Corruption 2Elevation of Privilege 2Sandbox Escape 1Spoofing Apple security release — June 29, 2026. "Yes/No" indicates whether each update is affected. CVE IDs link to NVD. CVE ID Component Impact iOS 26.5.2 / iPadOS 26.5.2 macOS Tahoe 26.5.2 Safari 26.5.2 CVE-2026-43743 IOGPUFamily An app may be able to cause unexpected system termination Yes Yes No CVE-2026-39868 Kernel An app may be able to cause unexpected system termination or corrupt kernel memory Yes Yes No CVE-2026-43722 Kernel An app may be able to leak sensitive kernel state Yes Yes No CVE-2026-43724 Kernel An app may be able to cause unexpected system termination or write kernel memory Yes Yes No CVE-2026-43703 libxslt Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes No CVE-2026-43706 libxslt Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes No CVE-2026-43704 Web Extensions A malicious web extension may be able to cause an unexpected process crash Yes Yes Yes CVE-2026-39872 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes Yes CVE-2026-43663 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes Yes CVE-2026-43676 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash Yes Yes Yes CVE-2026-43699 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes Yes CVE-2026-43700 WebKit Processing maliciously crafted web content may disclose sensitive user information Yes Yes Yes CVE-2026-43701 WebKit A malicious website may be able to process restricted web content outside the sandbox Yes Yes Yes CVE-2026-43705 WebKit Processing maliciously crafted web content may lead to memory corruption Yes Yes Yes CVE-2026-43707 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes Yes CVE-2026-43708 WebKit A malicious website may exfiltrate data cross-origin Yes Yes Yes CVE-2026-43709 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes Yes CVE-2026-43712 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes Yes CVE-2026-43713 WebKit Visiting a website may leak sensitive data Yes Yes Yes CVE-2026-43715 WebKit Processing maliciously crafted web content may lead to memory corruption Yes Yes Yes CVE-2026-43716 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash Yes Yes Yes CVE-2026-43725 WebKit A malicious website may be able to process restricted web content outside the sandbox Yes Yes Yes CVE-2026-43726 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes Yes CVE-2026-43727 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash Yes Yes Yes CVE-2026-43731 WebKit Processing maliciously crafted web content may lead to memory corruption Yes Yes Yes CVE-2026-43732 WebKit Processing maliciously crafted web content may disclose sensitive user information Yes Yes Yes CVE-2026-43734 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes Yes CVE-2026-43735 WebKit A malicious website may exfiltrate data cross-origin Yes Yes Yes CVE-2026-43740 WebKit Processing maliciously crafted web content may result in the disclosure of process memory Yes Yes Yes CVE-2026-43742 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes Yes CVE-2026-43745 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash Yes Yes Yes CVE-2026-43720 WebKit Canvas Processing maliciously crafted web content may lead to an unexpected Safari crash Yes Yes Yes CVE-2026-43721 WebKit Storage A malicious website may be able to silently hijack clipboard data Yes Yes Yes CVE-2026-28979 WebRTC Processing maliciously crafted web content may lead to an unexpected process crash Yes Yes Yes CVE-2026-43717 WebRTC Processing maliciously crafted web content may lead to an unexpected Safari crash Yes Yes Yes CVE-2026-43718 WebRTC Processing maliciously crafted web content may lead to an unexpected Safari crash Yes Yes Yes CVE-2026-43746 WebRTC Processing maliciously crafted web content may lead to an unexpected Safari crash Yes Yes Yes

We’ll continue these macOS updates if people find them useful. Stay tuned for the regularly schedule Patch Tuesday blog covering Adobe and Microsoft.

I’ve made it through Pwn2Own Berlin, had a little vacation, and now I’m back for Patch Tuesday. Microsoft and Adobe didn’t disappoint. In fact, they have heralded my return with the largest Patch Tuesday release ever. Thanks? Take a break from your regularly scheduled activities and let’s take a look at the latest security patches from Adobe and Microsoft. If you’d rather watch the full video recap covering the entire release, you can check it out here:

Adobe Patches for June 2026

For June, Adobe released 11 bulletins addressing 123 unique CVEs in Adobe Acrobat Reader, ColdFusion, Experience Manager, Experience Manager Forms, InDesign, InCopy, Substance 3D Sampler, Content Credentials SDK, Dreamweaver, Format Plugins, and Adobe Campaign Classic. A total of 11 of these CVEs were reported through the ZDI program.

Here’s this month’s overview table:

Bulletin ID Product CVE Count Highest Severity Highest CVSS Exploited Deployment Priority APSB26-66 Adobe Campaign Classic 2 Critical 10.0 No 1 APSB26-64 Adobe ColdFusion 7 Critical 9.6 No 1 APSB26-63 Adobe Acrobat Reader 20 Critical 7.8 No 2 APSB26-57 Adobe Experience Manager Forms 3 Critical 9.3 No 2 APSB26-62 Adobe Dreamweaver 5 Critical 8.6 No 3 APSB26-65 Adobe Format Plugins 2 Critical 7.8 No 3 APSB26-59 Adobe InCopy 3 Critical 7.8 No 3 APSB26-58 Adobe InDesign 12 Critical 7.8 No 3 APSB26-60 Adobe Substance 3D Sampler 4 Critical 7.8 No 3 APSB26-61 Content Credentials SDK 8 Critical 7.5 No 3 APSB26-56 Adobe Experience Manager 57 Important 5.4 No 3 TOTAL 11 bulletins 123

Obviously, the update for Campaign Classic should be on the top of your deployment list if you’re a user. A CVSS 10 is rare; two in the same bulletin is pretty much a unicorn. Adobe says there are no active attacks, but I would expect heavy research into creating one. The update for Coldfusion is also a Priority 1, but again, no known attacks is the wild. I suspect the Reader patch will also receive a lot of attention as malicious PDFs are common in ransomware attacks. The update for Experience Manager may be large, but it’s mostly just cross-site scripting (XSS) bugs.

Microsoft Patches for June 2026

This month, Microsoft released a new record 208 CVEs Windows and Windows components, Office and Office Components, Microsoft Edge (Chromium-based), Azure, .NET and Visual Studio, Github Copilot, Defender, Exchange Server, Hyper-V, Secure Boot, and BitLocker. At least, that’s my count. Microsoft’s tools seem to be having some issues, as they initially included a CVE from 2020 in this release. Regardless, the count is over 200, and I counted several times.

One of these bugs came through the ZDI program, but bugs submitted during Pwn2Own Berlin remain unpatched. If you include the Chromium and other third-party bugs, the total CVE count for June comes to a staggering 571 CVEs. 38 of these cases are rated Critical while the rest are rated Important in severity.

I’ve been counting CVEs on Patch Tuesday since 2017, and this is by far the largest monthly release in that time. The previous record was 177 set last year. It is extraordinary that Microsoft can produce so many patches in a single month, but it does raise concerns. How many of these cases were found using AI tools? How many patches were generated using AI to assist in coding or testing? What quality issues may exist in these patches? And likely most importantly, is this the new normal? The last two months were also large releases. Should sysadmins adjust their processes for prioritization and patch deployment based on this new volume of updates? Unfortunately, Microsoft is not providing those answers right now. Hopefully that changes in the future. BTW – just a note – the current number of CVEs shipped by Microsoft this year exceeds the total number of CVEs shipped in all of 2018.

One of the bugs patched by Microsoft this month is listed as under active exploitation and three others are listed as publicly known at the time of release. Let’s take a closer look at some of the more interesting updates for this month, starting with the bug being exploited in the wild.

-   CVE-2026-41091 - Microsoft Defender Elevation of Privilege Vulnerability
Since Microsoft doesn’t provide info on how widespread exploitation is, we must read some tea leaves. For this patch, several different people were acknowledged, which indicates multiple parties say this is in the wild, meaning exploitation is likely significant. The good news is that most people won’t need to take action as Defender updates itself. However, if you don’t have this configured or are in an isolated environment, you’ll need to update to the latest version.

-    CVE-2026-45657 - Windows Kernel Remote Code Execution Vulnerability
This CVSS 9.8 bug allows remote, unauthenticated attackers to execute code at SYSTEM level without user interaction. Yup – this is wormable. The problem lies in the way the kernel handles TCP/IP. This was listed as “Exploitation Less Likely” by Microsoft, but rest assured that every researcher and bug shop on the planet is reversing this patch right now trying to create an exploit. Test and deploy this patch quickly.

-    CVE-2026-47291 - HTTP.sys Remote Code Execution Vulnerability
Our second CVSS 9.8 bug of the month, this also allows remote, unauthenticated attackers to execute code on affected systems without user interaction. However, there is a caveat. Systems using the default MaxRequestBytes registry value used by the Windows HTTP stack are not affected by this bug. You can edit your registry settings if you need protection while you test and deploy the patch. The bulletin includes instructions and even a PowerShell script for doing this action. Microsoft lists this as “Exploitation more likely”, so I would definitely check your registry settings.

-    CVE-2026-44815 - DHCP Client Service Remote Code Execution Vulnerability
Here’s another CVSS 9.8 that has an odd incongruity. Although the CVSS says no permissions are required for exploitation, the write-up states it must be an “authenticated” user. I would err on the side of caution here and believe the CVSS. If that’s correct, then we have another bug where a remote, unauthenticated attacker could execute code on affected systems without user interaction. And since the DHCP client is on every OS, it’s a juicy target. This is another one to test and deploy with haste.

-    CVE-2026-45585/CVE-2026-50507 - Windows BitLocker Security Feature Bypass Vulnerability
If you’ve followed the ongoing saga of Nightmare Eclipse vs. MSRC, the bugs should look familiar. One is definitely a fix for “YellowKey”, while the other appears to be a fix for “GreenPlasma”. The researcher has promised a “bone shattering” drop on June 14, so let’s hope Microsoft is able to reach some understanding with the researcher before more 0-days are released. Also, there is a script provided by Microsoft as a mitigation, but the better strategy is to test and deploy the updates.

 Here’s the full list of CVEs released by Microsoft for June 2026:

CVE Title Severity CVSS Public Exploited XI Type CVE-2026-41091 Microsoft Defender Elevation of Privilege Vulnerability Important 7.8 Yes Yes 0 EoP CVE-2026-49160 HTTP.sys Denial of Service Vulnerability Important 7.5 Yes No 1 DoS CVE-2026-50507 Windows BitLocker Security Feature Bypass Vulnerability Important 6.8 Yes No 1 SFB CVE-2026-45586 Windows Collaborative Translation Framework (CTFMON) Elevation of Privilege Vulnerability Important 7.8 Yes No 1 EoP CVE-2025-10263 * ARM: CVE-2025-10263 Completion of affected memory accesses might not be guaranteed by completion of a TLBI [kernel] Critical 9.3 No No 2 EoP CVE-2026-48567 Azure HorizonDB Elevation of Privilege Vulnerability Critical 10 No No N/A EoP CVE-2026-32193 Azure Kubernetes Service (AKS) Remote Code Execution Vulnerability Critical 8.8 No No 3 RCE CVE-2026-47644 Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability Critical 6.5 No No 2 Info CVE-2026-44815 DHCP Client Service Remote Code Execution Vulnerability Critical 9.8 No No 2 RCE CVE-2026-47291 HTTP.sys Remote Code Execution Vulnerability Critical 9.8 No No 1 RCE CVE-2026-42824 M365 Copilot Information Disclosure Vulnerability Critical 6.5 No No N/A Info CVE-2026-45476 Microsoft Azure Network Adapter Elevation of Privilege Vulnerability Critical 8.2 No No 2 EoP CVE-2026-44810 Microsoft Cryptographic Services Elevation of Privilege Vulnerability Critical 8.4 No No 2 EoP CVE-2026-48579 Microsoft Exchange Online Information Disclosure Vulnerability Critical 9.1 No No N/A Info CVE-2026-47655 Microsoft Graph Information Disclosure Vulnerability Critical 6.5 No No N/A Info CVE-2026-45497 Microsoft M365 Copilot Remote Code Execution Vulnerability Critical 7.7 No No N/A RCE CVE-2026-45460 Microsoft Office Information Disclosure Vulnerability Critical 4.7 No No 3 Info CVE-2026-45472 Microsoft Office Remote Code Execution Vulnerability Critical 8.4 No No 2 RCE CVE-2026-45474 Microsoft Office Remote Code Execution Vulnerability Critical 8.4 No No 2 RCE CVE-2026-45461 Microsoft Office Remote Code Execution Vulnerability Critical 8.4 No No 2 RCE CVE-2026-45463 Microsoft Office Remote Code Execution Vulnerability Critical 8.4 No No 2 RCE CVE-2026-45456 Microsoft Outlook and Word Remote Code Execution Vulnerability Critical 8.4 No No 2 RCE CVE-2026-45458 Microsoft Outlook and Word Remote Code Execution Vulnerability Critical 8.4 No No 2 RCE CVE-2026-47635 Microsoft Outlook and Word Remote Code Execution Vulnerability Critical 8.4 No No 2 RCE CVE-2026-26142 Nuance PowerScribe Remote Code Execution Vulnerability Critical 9.8 No No 2 RCE CVE-2026-47289 Remote Desktop Client Remote Code Execution Vulnerability Critical 8.8 No No 2 RCE CVE-2026-47654 Remote Desktop Client Remote Code Execution Vulnerability Critical 7.5 No No 3 RCE CVE-2026-48563 Remote Desktop Client Remote Code Execution Vulnerability Critical 7.5 No No 2 RCE CVE-2026-42992 Remote Desktop Client Remote Code Execution Vulnerability Critical 7.5 No No 2 RCE CVE-2026-44799 Remote Desktop Client Remote Code Execution Vulnerability Critical 7.5 No No 2 RCE CVE-2026-44801 Remote Desktop Client Remote Code Execution Vulnerability Critical 7.5 No No 2 RCE CVE-2026-42985 Remote Desktop Client Remote Code Execution Vulnerability Critical 8.8 No No 1 RCE CVE-2026-45648 Windows Active Directory Domain Services Remote Code Execution Vulnerability Critical 8.8 No No 3 RCE CVE-2026-42987 Windows Deployment Services (WDS) Remote Code Execution Critical 8.1 No No 2 RCE CVE-2026-33828 Windows Device Health Attestation (DHA) Elevation of Privilege Vulnerability Critical 7.8 No No 3 EoP CVE-2026-44803 Windows Graphics Component Remote Code Execution Vulnerability Critical 7.8 No No 1 RCE CVE-2026-44812 Windows Graphics Component Remote Code Execution Vulnerability Critical 7.8 No No 1 RCE CVE-2026-45607 Windows Hyper-V Remote Code Execution Vulnerability Critical 8.4 No No 2 RCE CVE-2026-45641 Windows Hyper-V Remote Code Execution Vulnerability Critical 8.4 No No 2 RCE CVE-2026-47652 Windows Hyper-V Remote Code Execution Vulnerability Critical 8.2 No No 2 RCE CVE-2026-47288 Windows Kerberos Key Distribution Center (KDC) Remote Code Execution Critical 7.1 No No 3 RCE CVE-2026-45657 Windows Kernel Remote Code Execution Vulnerability Critical 9.8 No No 2 RCE CVE-2026-48574 Windows Media Remote Code Execution Vulnerability Critical 7.8 No No 2 RCE CVE-2026-45490 .NET SDK Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-45491 .NET Tampering Vulnerability Important 6.2 No No 3 Tampering CVE-2026-45591 ASP.NET Core Denial of Service Vulnerability Important 7.5 No No 2 DoS CVE-2026-47643 Azure Stack Edge Remote Code Execution Vulnerability Important 9.8 No No 3 RCE CVE-2026-41098 Azure Stack Edge Spoofing Vulnerability Important 8.4 No No 2 Spoofing CVE-2026-45642 Microsoft Azure Attestation service and Device Health Attestation Service Spoofing Vulnerability Important 3.9 No No 2 Spoofing CVE-2026-45650 Microsoft Bing Search Spoofing Vulnerability Important 4.3 No No 2 Spoofing CVE-2026-45637 Microsoft DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-45647 Microsoft Defender for Endpoint for Mac Elevation of Privilege Vulnerability Important 5.5 No No 2 EoP CVE-2026-40371 Microsoft Dynamics 365 (on-premises) Elevation of Privilege Vulnerability Important 8.8 No No 2 EoP CVE-2026-44822 Microsoft Excel Information Disclosure Vulnerability Important 8.2 No No 3 Info CVE-2026-45455 Microsoft Excel Information Disclosure Vulnerability Important 3.3 No No 2 Info CVE-2026-45469 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-44817 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No 3 RCE CVE-2026-44818 Microsoft Excel Remote Code Execution Vulnerability Important 7 No No 2 RCE CVE-2026-44820 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-44823 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-45459 Microsoft Excel Security Feature Bypass Vulnerability Important 3.3 No No 2 SFB CVE-2026-45504 Microsoft Exchange Server Elevation of Privilege Vulnerability Important 8.8 No No 3 EoP CVE-2026-45502 Microsoft Exchange Server Information Disclosure Vulnerability Important 5 No No 3 Info CVE-2026-45503 Microsoft Exchange Server Information Disclosure Vulnerability Important 8.1 No No 3 Info CVE-2026-45583 Microsoft Exchange Server Remote Code Execution Vulnerability Important 7.5 No No 2 RCE CVE-2026-45500 Microsoft Exchange Server Spoofing Vulnerability Important 6.1 No No 2 Spoofing CVE-2026-45501 Microsoft Exchange Server Spoofing Vulnerability Important 6.5 No No 2 Spoofing CVE-2026-47631 Microsoft Exchange Server Spoofing Vulnerability Important 8.1 No No 2 Spoofing CVE-2026-42986 Microsoft Graphics Component Elevation of Privilege Vulnerability Important 7.8 No No 1 EoP CVE-2026-41092 Microsoft Kinect Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-45644 Microsoft Live Share Canvas SDK Elevation of Privilege Vulnerability Important 8 No No 2 EoP CVE-2026-47293 Microsoft Office Click-To-Run Elevation of Privilege Vulnerability Important 7 No No 2 EoP CVE-2026-45485 Microsoft Office Information Disclosure Vulnerability Important 3.3 No No 2 Info CVE-2026-44821 Microsoft Office Information Disclosure Vulnerability Important 5.5 No No 2 Info CVE-2026-45483 Microsoft Office Project Server Spoofing Vulnerability Important 4.6 No No 2 Spoofing CVE-2026-45475 Microsoft Office Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-44819 Microsoft Office Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-44824 Microsoft Office Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-45645 Microsoft Office Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-49161 Microsoft PC Manager Security Feature Bypass Vulnerability Important 7.8 No No 3 SFB CVE-2026-42902 Microsoft PowerToys Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-45484 Microsoft SharePoint Elevation of Privilege Vulnerability Important 8.8 No No 2 EoP CVE-2026-45454 Microsoft SharePoint Remote Code Execution Vulnerability Important 6.5 No No 2 RCE CVE-2026-47298 Microsoft SharePoint Server Remote Code Execution Vulnerability Important 8 No No 2 RCE CVE-2026-45467 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No 2 Spoofing CVE-2026-45468 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No 2 Spoofing CVE-2026-45479 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No 2 Spoofing CVE-2026-45453 Microsoft SharePoint Server Spoofing Vulnerability Important 5.4 No No 2 Spoofing CVE-2026-47636 Microsoft SharePoint Server Spoofing Vulnerability Important 5.4 No No 2 Spoofing CVE-2026-47637 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No 2 Spoofing CVE-2026-47638 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No 2 Spoofing CVE-2026-47639 Microsoft SharePoint Server Spoofing Vulnerability Important 5.4 No No 3 Spoofing CVE-2026-47641 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No 2 Spoofing CVE-2026-33113 Microsoft SharePoint Server Spoofing Vulnerability Important 5.4 No No 2 Spoofing CVE-2026-45462 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No 2 Spoofing CVE-2026-45464 Microsoft SharePoint Server Spoofing Vulnerability Important 5.4 No No 2 Spoofing CVE-2026-45465 Microsoft SharePoint Server Spoofing Vulnerability Important 5.4 No No 2 Spoofing CVE-2026-47634 Microsoft SharePoint Server Spoofing Vulnerability Important 7.3 No No 1 Spoofing CVE-2026-47640 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No 3 Spoofing CVE-2026-45481 Microsoft SharePoint Server Spoofing Vulnerability Important 7.3 No No 1 Spoofing CVE-2026-48560 Microsoft SharePoint Server Spoofing Vulnerability Important 5.4 No No 2 Spoofing CVE-2026-48562 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No 2 Spoofing CVE-2026-42835 Microsoft Teams for Android Information Disclosure Vulnerability Important 8.1 No No 2 Info CVE-2026-45606 Microsoft UxTheme Library (uxtheme.dll) Denial of Service Vulnerability Important 5.5 No No 2 DoS CVE-2026-45482 Microsoft Visual Studio Code CoPilot Chat Extension Security Feature Bypass Vulnerability Important 8.4 No No 2 SFB CVE-2026-45466 Microsoft Word Information Disclosure Vulnerability Important 3.3 No No 3 Info CVE-2026-45471 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-45486 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-45643 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-45457 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-42980 NT OS Kernel Elevation of Privilege Vulnerability Important 7.8 No No 1 EoP CVE-2026-42916 NT OS Kernel Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-45649 Office for Android Spoofing Vulnerability Important 7.1 No No 3 Spoofing CVE-2026-47653 Remote Desktop Client Remote Code Execution Vulnerability Important 8.8 No No 3 RCE CVE-2026-42909 Remote Desktop Client Remote Code Execution Vulnerability Important 7.5 No No 3 RCE CVE-2026-42913 Remote Desktop Client Remote Code Execution Vulnerability Important 7.5 No No 3 RCE CVE-2026-42993 Remote Desktop Client Remote Code Execution Vulnerability Important 7.5 No No 2 RCE CVE-2026-45588 Secure Boot Security Feature Bypass Vulnerability Important 7.9 No No 2 SFB CVE-2026-48568 Secure Boot Security Feature Bypass Vulnerability Important 7.9 No No 2 SFB CVE-2026-48570 Secure Boot Security Feature Bypass Vulnerability Important 7.9 No No 2 SFB CVE-2026-48573 Secure Boot Security Feature Bypass Vulnerability Important 7.9 No No 2 SFB CVE-2026-48575 Secure Boot Security Feature Bypass Vulnerability Important 7.9 No No 2 SFB CVE-2026-48576 Secure Boot Security Feature Bypass Vulnerability Important 7.9 No No 2 SFB CVE-2026-48578 Secure Boot Security Feature Bypass Vulnerability Important 7.9 No No 2 SFB CVE-2026-45654 Secure Boot Security Feature Bypass Vulnerability Important 7.9 No No 2 SFB CVE-2026-45656 UEFI Secure Boot Security Feature Bypass Vulnerability Important 7.8 No No 2 SFB CVE-2026-8863 UEFI Secure Boot Security Feature Bypass Vulnerability Important 7.8 No No 2 SFB CVE-2026-40376 Visual Studio Code Elevation of Privilege Vulnerability Important 7.5 No No 2 EoP CVE-2026-47281 Visual Studio Code Elevation of Privilege Vulnerability Important 9.6 No No 3 EoP CVE-2026-47284 Visual Studio Code Information Disclosure Vulnerability Important 6.5 No No 2 Info CVE-2026-47292 Visual Studio Code MSSQL Extension Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-48569 Visual Studio Code Security Feature Bypass Vulnerability Important 7.1 No No 2 SFB CVE-2026-47287 Visual Studio Code Tampering Vulnerability Important 6.5 No No 2 Tampering CVE-2026-42829 Windows Administrator Protection Secure Feature Bypass Vulnerability Important 7.8 No No 2 SFB CVE-2026-34335 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No 3 EoP CVE-2026-45601 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No 2 EoP CVE-2026-45598 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No 2 EoP CVE-2026-45596 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No 2 EoP CVE-2026-45638 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-45603 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No 2 EoP CVE-2026-42911 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No 2 EoP CVE-2026-45594 Windows Application Identity (AppID) Information Disclosure Vulnerability Important 5.5 No No 2 Info CVE-2026-45655 Windows BitLocker Security Feature Bypass Vulnerability Important 5.3 No No 2 SFB CVE-2026-45658 Windows BitLocker Security Feature Bypass Vulnerability Important 7.8 No No 1 SFB CVE-2026-45640 Windows Bluetooth Port Driver Elevation of Privilege Vulnerability Important 7 No No 2 EoP CVE-2026-45605 Windows Bluetooth Service Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-47656 Windows Boot Manager Security Feature Bypass Vulnerability Important 7.9 No No 2 SFB CVE-2026-44809 Windows Common Log File System Driver Elevation of Privilege Vulnerability Important 7.8 No No 3 EoP CVE-2026-45634 Windows DHCP Client Information Disclosure Vulnerability Important 5.5 No No 3 Info CVE-2026-45608 Windows DHCP Client Information Disclosure Vulnerability Important 6.8 No No 3 Info CVE-2026-41108 Windows DNS Client Elevation of Privilege Vulnerability Important 7 No No 3 EoP CVE-2026-42905 Windows DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No 1 EoP CVE-2026-44811 Windows DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-44808 Windows DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-44807 Windows DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-42983 Windows DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-44802 Windows DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-44813 Windows DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-44804 Windows DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-48566 Windows DWM Core Library Information Disclosure Vulnerability Important 5.5 No No 2 Info CVE-2026-44814 Windows DWM Core Library Information Disclosure Vulnerability Important 5.5 No No 2 Info CVE-2026-45602 Windows Dynamic Host Configuration Protocol (DHCP) Tampering Vulnerability Important 9.1 No No 2 Tampering CVE-2026-42836 Windows Function Discovery Service (fdwsd.dll) Elevation of Privilege Vulnerability Important 7 No No 2 EoP CVE-2026-42910 Windows Hotpatch Monitoring Service Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-42972 Windows Hyper-V Information Disclosure Vulnerability Important 5.5 No No 2 Info CVE-2026-45592 Windows Internet (wininet.dll) Elevation of Privilege Vulnerability Important 7.8 No No 3 EoP CVE-2026-42903 Windows Kerberos Denial of Service Vulnerability Important 6.5 No No 3 DoS CVE-2026-42914 Windows Kerberos Denial of Service Vulnerability Important 5.3 No No 2 DoS CVE-2026-48583 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-45653 Windows Kernel Elevation of Privilege Vulnerability Important 7 No No 3 EoP CVE-2026-42984 Windows Kernel Elevation of Privilege Vulnerability Important 7 No No 3 EoP CVE-2026-45600 Windows Kernel-Mode Driver Elevation of Privilege Vulnerability Important 7.8 No No 3 EoP CVE-2026-45604 Windows Managed Installer Information Disclosure Vulnerability Important 5.5 No No 2 Info CVE-2026-45595 Windows Mark of the Web Security Feature Bypass Vulnerability Important 5.4 No No 2 SFB CVE-2026-45636 Windows NTFS Remote Code Execution Vulnerability Important 7.8 No No 2 RCE CVE-2026-50508 Windows NTLM Spoofing Vulnerability Important 6.5 No No 1 Spoofing CVE-2026-48565 Windows Narrator Braille Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-44805 Windows Network Controller (NC) Host Agent Denial of Service Vulnerability Important 5.5 No No 3 DoS CVE-2026-42981 Windows Performance Monitor Remote Code Execution Vulnerability Important 8.1 No No 2 RCE CVE-2026-42974 Windows Performance Monitor Remote Code Execution Vulnerability Important 8.1 No No 2 RCE CVE-2026-45487 Windows Program Compatibility Assistant Service Elevation of Privilege Vulnerability Important 7.8 No No 3 EoP CVE-2026-42828 Windows Projected File System Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-42837 Windows Projected File System Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-42969 Windows Push Notification Information Disclosure Vulnerability Important 5.5 No No 3 Info CVE-2026-42971 Windows Push Notification Information Disclosure Vulnerability Important 5.5 No No 2 Info CVE-2026-42970 Windows Push Notification Information Disclosure Vulnerability Important 5.5 No No 2 Info CVE-2026-42973 Windows Push Notification Information Disclosure Vulnerability Important 5.5 No No 2 Info CVE-2026-42978 Windows Push Notifications Elevation of Privilege Vulnerability Important 7.8 No No 3 EoP CVE-2026-42977 Windows Push Notifications Elevation of Privilege Vulnerability Important 7.8 No No 3 EoP CVE-2026-42979 Windows Push Notifications Elevation of Privilege Vulnerability Important 7.8 No No 3 EoP CVE-2026-42991 Windows Push Notifications Elevation of Privilege Vulnerability Important 7.8 No No 3 EoP CVE-2026-45639 Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability Important 7.5 No No 2 Info CVE-2026-42908 Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability Important 7.5 No No 2 Info CVE-2026-45593 Windows SDK Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-42906 Windows Shell Information Disclosure Vulnerability Important 5.5 No No 2 Info CVE-2026-42907 Windows Shell Information Disclosure Vulnerability Important 6.5 No No 2 Info CVE-2026-47648 Windows Storage Elevation of Privilege Vulnerability Important 7 No No 3 EoP CVE-2026-42915 Windows TCP/IP Denial of Service Vulnerability Important 5.7 No No 2 DoS CVE-2026-42904 Windows TCP/IP Elevation of Privilege Vulnerability Important 9.6 No No 3 EoP CVE-2026-42968 Windows Telephony Server Information Disclosure Vulnerability Important 5.5 No No 2 Info CVE-2026-42912 Windows Telephony Service Elevation of Privilege Vulnerability Important 7 No No 2 EoP CVE-2026-45597 Windows UI Automation Manager (uiamanager.dll) Elevation of Privilege Vulnerability Important 7 No No 3 EoP CVE-2026-45599 Windows UPnP Device Host Remote Code Execution Vulnerability Important 8.1 No No 2 RCE CVE-2026-45635 Windows UPnP Device Host Remote Code Execution Vulnerability Important 8.1 No No 2 RCE CVE-2026-40409 Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-40404 Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability Important 7.8 No No 2 EoP CVE-2026-42989 Winlogon Elevation of Privilege Vulnerability Important 7.8 No No 1 EoP

* Indicates this CVE had been released by a third party and is now being included in Microsoft releases.

† Indicates further administrative actions are required to fully address the vulnerability.

 

Looking at the other Critical-rated bugs in this release, the scariest-looking one is actually nothing to concern yourself with at all. The CVSS 10 bug in Azure HorizonDB has already been addressed by Microsoft and is just being documented now. That’s also the case for five others. Of course, there wouldn’t be a release without Office bugs that have the Preview Pane as an attack vector. There are multiple in June. There’s a handful of bugs in the Remote Desktop Client, but these rely on connecting to a malicious RDP server. There are three patches for Hyper-V that allow for guest-to-host code execution. The bug in Active Directory requires authentication, but any authenticated user can hit it. For the Windows Directory Service vulnerability, it needs to be listening for TFTP. You have blocked that everywhere, right? The bug in Azure Network Adapter is somewhat unique as you need to update your Linux kernel to be protected. The bug in Azure Kubernetes allows an attacker to break out of a container and gain control of the AKS worker node. Finally, the bug in the Kerberos Key Distribution Center (KDC) seems unlikely, but if exploited, it could allow authenticated attackers to get code execution on affected systems.

Moving on to the other code execution bugs, there are the ubiquitous open-an-own bugs in Office components like Excel and Word. The code injection bug in Exchange Server looks troubling, but it requires a machine-in-the-middle (MiTM), so exploitation is unlikely. The bugs in SharePoint require authentication, but you should note that the patch applies to both SharePoint Server 2016 and SharePoint Enterprise Server 2016. The two bugs in UPnP are interesting. Both can lead to code execution by causing an error during the handling of specially crafted data, which could lead to a Use After Free (UAF) bug. The bugs in RDP Client all require connecting to a malicious RDP server, but it’s not clear why some are rated Critical and some are rated Important. The NTFS vulnerability requires a user to mount a virtual hard drive on an affected system. The last RCE bug this month is in Azure Stack Edge and requires the attacker to send a specially crafted file upload request that includes a manipulated file name or path, leading to code execution.

There are more than 60 Elevation of Privilege (EoP) bugs in this month’s release, and as usual, most simply lead to local attackers executing their code at SYSTEM-level privileges or administrative privileges, so there’s not much to add without further technical details about the bugs themselves. A notable exception is in Exchange Server, where a user on Outlook Web Access (OWA) could gain access to other mailboxes. The bug in Visual Studio Code could allow attackers to gain permissions associated with the MCP Server’s managed identity. The bugs in Windows SDK and Windows UI Automation Manager could let attacker go from low integrity up to medium integrity code execution. The bug in Bluetooth just allows “elevated” privileges without really describing what elevated might be.

Moving on to the more than 20 security feature bypass (SFB) bugs in the June release, there are a total of 10 that impact Secure Boot. All carry scope change (S:C) in the CVSS, meaning successful exploitation affects security boundaries beyond the vulnerable component itself — specifically the ability to load untrusted code at boot, bypass Virtual Secure Mode, and undermine boot integrity guarantees. CVE-2026-45654 explicitly calls out VSM exposure. The bulk of these are credited to Alon Leviev (STORM), which is notable given his prior BootKitty/BlackLotus-adjacent research. The bugs in the Windows Boot Manager have a similar impact as the Secure Boot bugs. The UEFI Secure Boot vulnerabilities go a layer deeper. They require either local admin or physical access but could allow for the running of untrusted code even before the OS loads. Rootkits anyone? The four bugs in BitLocker all require physical access but could yield encrypted data if exploited. The bug in Windows Administration Protection allows attackers to bypass the feature that prevents standard-user apps from performing admin-level actions. The bug in Visual Studio Copilot Chat could be the most interesting non-boot bug here as it allows authentication impersonation. Mark of the Web (MotW) and Excel vulns could bypass user warnings. Lastly, the bug in PC Manager bypasses expected user controls.

Turning our attention to the mass of spoofing bugs in the release, we instantly see 18 impacting SharePoint Server. Fortunately, these are simply cross-site scripting (XSS) bugs. It’s the Exchange bugs we should really watch for. One is an XSS that an attacker can exploit by convincing an Exchange administrator to open a malicious link or message, which then runs code in the admin's web session. That's a meaningful privilege escalation path. Another is listed as an SSRF-based attack, but no other details are available. The last is a lower-impact XSS with limited confidentiality/integrity loss. The bug in Bing Search (remember Bing?) is a classic search result spoofing. The bug in Azure Stack Edge is interesting as it could allow access to resources outside the vulnerable component's security boundary. The bug in Office for Android requires user interaction. The Office Project Server bug is an authenticated XSS with low impact. The final spoofing bug is in Azure Attestation but has already been addressed. You should still verify you are protected by following the instructions in the write-up from Microsoft.

There are 30 different information disclosure bugs in this release, and fortunately, the vast majority of these simply result in info leaks consisting of unspecified memory contents or memory addresses. The two bugs in Visual Studio require user interaction and could “disclose information over a network.” How obtuse. The bug in GitHub Copilot and Visual Studio Code could disclose discloses a sign-in access token for a user's work account. That's a meaningful credential exposure, not just random memory. That leaves the two bugs in Exchange Server. One could allow an authenticated user to gain information about which network services that the Exchange server can reach. The other sounds much like the spoofing bug in OWA as it allows attackers to see information in mailboxes they should not have access to.

I’ve never been a fan of the “tampering” category, as it could mean so many different things. For example, the bug in .NET simply says it could allow an unauthorized attacker to perform tampering locally. Similarly, the bug in Visual Studio says the same, expect here the tampering occurs over a network. Microsoft doesn’t even bother with a CWE for the tampering bug in the DHCP Server, so your guess is as good as mine.

There are seven DoS bugs in the June release, and as usual, Microsoft provides little to no actionable information about the vulnerabilities. The most interesting is the bug in HTTP.sys, which is listed as publicly known. This is an uncontrolled resource consumption, rated "Exploitation More Likely," and publicly disclosed. Since, HTTP.sys sits at the core of IIS and Windows web services, a network-accessible DoS here can take down any Windows server running HTTP-based services. Based on the Acknowledgement, it looks like this bug may have been found using AI. There are no real details for the other bugs, but based simply on the impact, I would focus on the Kerberos and TCP/IP bugs if you had to prioritize.

No new advisories are being released this month.

Looking Ahead

The next Patch Tuesday will be on July 14 and will be the last one before Black Hat/DEFCON. It’s usually a big release, so strap in and hang on. I’ll be back then to give you my full thoughts. Until then, stay safe, happy patching, and may all your reboots be smooth and clean!

 

Following two days of intense competition, Day Three of Pwn2Own Berlin 2026 brought the curtain down on an incredible event. Security researchers delivered their final exploits, pushing enterprise systems to the limit one last time as the race for Master of Pwn came to a close.

Day Three added to an already historic event, bringing the final totals to $1,298,250 awarded for 47 unique 0-day vulnerabilities across three days of competition. DEVCORE claimed the title of Master of Pwn with a commanding 50.5 points and $505,000 — a dominant performance across all three days. STARLabs SG finished in second with 25 points and $242,500, followed by Out Of Bounds in third with 12.75 points and $95,750.

Congratulations to all the researchers who participated, and a special thank you to OffensiveCon for hosting. We'll see you at the next Pwn2Own.

Here are the results of Day Three:

SUCCESS/COLLISION - Sina Kheirkhah (@SinSinology) of Summoning Team (@SummoningTeam) used two bugs to exploit Red Hat Linux, but one of the bugs was previously known. He still earns $7,000 and 1.5 Master of Pwn points.

SUCCESS - Le Tran Hai Tung (@tacbliw), dungnm (@dungnm_) and hieuvd (@gr4ss341) of Viettel Cyber Security (@vcslab) used an integer overflow to escalate privileges on #Windows 11. Their 5th round win nets them $7,500 and 3 Master of Pwn points.

SUCCESS - Satoki Tsuji (@satoki00) of Ikotas Labs, Inc. abused an external control to exploit OpenAI Codex and pop a host of calcs. He earns $20,000 and 4 Master of Pwn points.

FAILURE - Unfortunately, Giuseppe Calì of Summoning Team (@SummoningTeam) could not get their exploit of VMware ESXi working within the time allotted.

COLLISON - Although successful on stage, Emanuele Barbeno, Cyrill Bannwart, Yves Bieri, Lukasz D., Urs Mueller (@compasssecurity) of Compass Security targeted Anthropic Claude Code, hitting a one-vulnerability collision with a previous attempt and earning $20,000 and 2 Master of Pwn points.

SUCCESS - Hyunwoo Kim (@v4bel) chained a use-after-free and uninitialized memory bug to escalate privileges on Red Hat Enterprise Linux for Workstations in the fourth round, earning $5,000 and 2 Master of Pwn points.

SUCCESS - splitline (@splitline) of DEVCORE Research Team chained 2 bugs to exploit Microsoft SharePoint, earning $100,000 and 10 Master of Pwn points.

SUCCESS - Nguyen Hoang Thach (@hi_im_d4rkn3ss) of STARLabs SG (@starlabs_sg) used a Memory Corruption bug to exploit VMware ESXi with the Cross-tenant Code Execution add-on, earning $200,000 and 20 Master of Pwn points.

COLLISON - While Byung Young Yi (@yibarrack) of Out Of Bounds successfully demonstrated their exploit of Anthropic Claude Code, the bug used had been previously disclosed. They still earn $20,000 and 2 Master of Pwn points.

Day Two of Pwn2Own Berlin 2026 and the stakes continue to rise! Security researchers are back on the Pwn2Own stage, pushing enterprise systems to their limits as the competition heats up. More exploits, more surprises, and more standout moments are unfolding, so follow along here for live updates as the race for Master of Pwn intensifies. There were plenty of big targets on the schedule today, including SharePoint, Exchange, and Safari.

Following an action-packed Day One where $523,000 was awarded for 24 unique 0-day vulnerabilities, Day Two added another $385,750 and 15 unique 0-days, bringing event totals to $908,750 with 39 unique vulnerabilities overall. DEVCORE holds a commanding lead for Master of Pwn with 40.5 points and $405,000, but with one day still to go, anything can happen. Here are the standings as of Day Two but we'll see what the final day of the contest brings. Stay tuned!

We’ll be posting real-time updates and results throughout the competition right here on our blog and across social media. Stay up to date by following us on Twitter, Mastodon, LinkedIn, and Bluesky, and join the conversation using #Pwn2Own Berlin and #P2OBerlin for continuous coverage. 

FAILURE - Unfortunately, Tao Yan & Edouard Bochin of Palo Alto Networks could not get their exploit of Apple Safari – Renderer Only working within the time allotted.

FAILURE - Unfortunately, Stephen Fewer of Rapid7 could not get their exploit of Microsoft SharePoint working within the time allotted.

SUCCESS - Ben Koo (@kiddo_pwn) of Team DDOS used a use-after-free bug to escalate privileges on Red Hat Enterprise Linux for Workstations in the second round, earning $10,000 and 1 Master of Pwn point.

SUCCESS - Dialed in! Nikolaos Mourousias (@deltaclock), Caue Obici (@caueobici) & Bruno Halltari (@BrunoModificato) of OtterSec used a Code Injection bug to exploit LM Studio in the second round, earning $20,000 and 4 Master of Pwn points. Full win!

COLLISON - Although successful on stage, Sina Kheirkhah (@SinSinology) of Summoning Team (@SummoningTeam) targeting Claude Desktop in the Coding Agent category used a bug that was previously known. They still earn $10,000 and 2 Master of Pwn points.

SUCCESS - Le Duc Anh Vu (@vulda17) of Viettel Cyber Security (@vcslab) exploited Cursor, earning $30,000 and 3 Master of Pwn points. Full win!

WITHDRAWAL - Kiyong Kwak of Kakaogames and Song Nuri of Samsung Electronics has withdrawn their entry for Apple Safari – Renderer Only in the Web Browser category.

FAILURE - Unfortunately, Ruitong of Abstract Team, University of Colorado Boulder could not get their exploit of Red Hat Enterprise Linux for Workstations working within the time allotted.

SUCCESS - Sina Kheirkhah (@SinSinology) of Summoning Team (@SummoningTeam) exploited OpenAI Codex in the second round, earning $20,000 and 4 Master of Pwn points.

COLLISON - Although successful on stage, Billy (@st424204), Bruce Chen (@bruce30262), Pan Zhenpeng (@Peterpan980927) & Weiming Shi (@bestswngs) of STARLabs SG (@starlabs_sg) targeting NVIDIA Megatron Bridge used a bug that was previously known. They still earn $2,500 and 1 Master of Pwn point.

WITHDRAWAL - Alon Ben Tsur (@iamgweej), Yahav Azran (@_yahav) have withdrawn their entry for Red Hat Enterprise Linux for Workstations in the Local Escalation of Privilege category.

SUCCESS - Orange Tsai (@orange_8361) of DEVCORE Research Team chained 3 bugs to achieve Remote Code Execution as SYSTEM on Microsoft Exchange, earning $200,000 and 20 Master of Pwn points.

SUCCESS / COLLISON - David Tae & Louis Hur of Out Of Bounds targeted Ollama, hitting a one-vulnerability collision with a previous attempt and earning $28,000 and 3 Master of Pwn points.

FAILURE - Nguyen Thanh Dat (@rewhiles) of Viettel Cyber Security (@vcslab) could not get their exploit of Mozilla Firefox – Renderer Only working within the time allotted.

SUCCESS - Cyrill Bannwart, Emanuele Barbeno, Yves Bieri, Lukasz D., Urs Mueller (@compasssecurity) of Compass Security exploited Cursor in the second round, earning $15,000 and 3 Master of Pwn points.

SUCCESS - Siyeon Wi used an integer overflow bug to escalate privileges on Microsoft Windows 11 in the fourth round, earning $7,500 and 3 Master of Pwn points.

SUCCESS / COLLISON - Byung Young Yi (@yibarrack) of Out Of Bounds targeted LiteLLM, hitting a one-vulnerability collision with a previous attempt and earning $17,750 and 3.75 Master of Pwn points.

SUCCESS - Confirmed! 0xDACA (@0xDACA) & Noam Trobishi (@NTrobishi) used a use-after-free bug to exploit NV Container Toolkit in the second round, earning $25,000 and 5 Master of Pwn points.

Welcome to Day One of Pwn2Own Berlin 2026! Today, 22 entries took the Pwn2Own stage to target AI Databases, Coding Agents, Local Inferences, and a separate category for NVIDIA products, as the world’s top security researchers push technology to its limits. Exploits, surprises, and breakthrough discoveries are unfolding.

After Day One, we awarded $523,000 for 24 unique 0-days! DEVCORE is currently in the lead for Master of Pwn, but a pack of teams are right on their heels. Stay tuned tomorrow for more results and surprises.

Follow the action live! We’ll be posting real-time updates and results throughout the competition on our blog and across social media. Stay up to date by following us on Twitter, Mastodon, LinkedIn, and Bluesky, and join the conversation using #Pwn2Own Berlin and #P2OBerlin for continuous coverage. 

FAILURE - Unfortunately, Le Duc Anh Vu (@vulda17) of Viettel Cyber Security (@vcslab) could not get their exploit of OpenAI Codex working within the time allotted.

SUCCESS - Orange Tsai (@orange_8361) of DEVCORE Research Team (@d3vc0r3) chained 4 logic bugs to achieve a sandbox escape on Microsoft Edge, earning $175,000 and 17.5 Master of Pwn points.

SUCCESS - chompie of IBM X-Force Offensive Research (XOR) used a single bug to exploit NV Container Toolkit, earning $50,000 and 5 Master of Pwn points.

SUCCESS - k3vg3n chained 3 bugs including SSRF and Code Injection to take down LiteLLM. $40,000 and 4 Master of Pwn points. Full win.

SUCCESS - Satoki Tsuji (@satoki00) of Ikotas Labs, Inc. used an Overly Permissive Allowed List bug to exploit NVIDIA Megatron Bridge, earning $20,000 and 2 Master of Pwn points.

FAILURE - Unfortunately, Park Jae Min could not get their exploit of Oracle Autonomous AI Database working within the time allotted. #Pwn2Own #P2OBerlin

SUCCESS - Emanuele Barbeno, Cyrill Bannwart, Yves Bieri, Lukasz D., Urs Mueller of Compass Security (@compasssecurity) used a single CWE-150 bug to exploit OpenAI Codex, earning $40,000 and 4 Master of Pwn points.

SUCCESS - Angelboy (@scwuaptx) & TwinkleStar03 (@_twinklestar03) of DEVCORE Research Team used an Improper Access Control bug to escalate privileges on Microsoft Windows 11, earning $30,000 and 3 Master of Pwn points.

WITHDRAWAL - Ben Koo (@kiddo_pwn) of Team DDOS has withdrawn their entry for Mozilla Firefox – Renderer Only in the Web Browser category

FAILURE - Unfortunately, Interrupt Labs could not get their exploit of NV Container Toolkit working within the time allotted

COLLISON - Although successful on stage, the Ikotas Labs, Inc. team targeting LiteLLM in the Local Inference category used bugs that were previously known. They still earn $8,000 and 1.75 Master of Pwn points.

SUCCESS - Yoseop Kim (@pwning_me) used a CWE-470 bug to exploit NVIDIA Megatron Bridge in the second round, earning $10,000 and 2 Master of Pwn points.

COLLISON - Although successful on stage, maitai (@MaitaiThe) of Doyensec (@Doyensec) targeting OpenAI Codex in the Coding Agent category used a bug that was previously known to the vendor. They still earn $10,000 and 2 Master of Pwn points.

WITHDRAWAL - Yoseop Kim(@pwning_me) has withdrawn their entry for Mozilla Firefox – Renderer Only in the Web Browser category

SUCCESS - haehae (@haehaeYang) of Out Of Bounds chained 2 bugs (CWE-190, CWE-362) to exploit Chroma, earning $20,000 and 2 Master of Pwn points.

SUCCESS - Billy (@st424204), Pan Zhenpeng (@Peterpan980927) & Weiming Shi (@bestswngs) of STARLabs SG (@starlabs_sg) chained 5 bugs (incl. SSRF and Code Injection) to exploit LM Studio, earning $40,000 and 4 Master of Pwn points. Full win!

SUCCESS - Marcin Wiązowski used a heap-based buffer overflow to escalate privileges on Microsoft Windows 11 in the second round, earning $15,000 and 3 Master of Pwn points.

WITHDRAWAL - Qrious Secure (@qriousec) has withdrawn their entry for LM Studio in the Local Inference category.

SUCCESS - Chompie of IBM X-Force Offensive Research (XOR) used a race condition to escalate privileges on Red Hat Enterprise Linux for Workstations, earning $20,000 and 2 Master of Pwn points.

COLLISON - Although successful on stage, Nguyen Thanh Dat (@rewhiles) of Viettel Cyber Security (@vcslab) targeting Anthropic Claude Code in the Coding Agent category used a bug that was previously known to the vendor. They still earn $20,000 and 2 Master of Pwn points

SUCCESS - haehae (@haehaeYang) of Out Of Bounds used a Path Traversal bug to exploit NVIDIA Megatron Bridge in the second round, earning $10,000 and 2 Master of Pwn points. Full win!

SUCCESS - Kentaro Kawane of GMO Cybersecurity by Ierae chained 2 Use-After-Free bugs to escalate privileges on Microsoft Windows 11 in the third round, earning $15,000 and 3 Master of Pwn points.

Willkommen! (Welcome!) Pwn2Own Berlin 2026 has arrived at OffensiveCon, and the world’s top security researchers are ready. This year’s enterprise-focused competition features AI Databases, Coding Agents, Local Inferences, and a separate category for NVIDIA products.

Earlier today, we held the random draw to determine attempt order. Below is the official schedule. All times are Berlin local time (CET) and may change as the competition progresses. Check back for live updates.

In case you missed it, you can watch the draw here.

Jump to:

Day One

Day Two

Day Three

DAY ONE

Thursday, May 14 - 1030

chompie of IBM X-Force Offensive Research (XOR) targeting NV Container Toolkit in the NVIDIA category for a total of $50,000 and 5 Master of Pwn points

Le Duc Anh Vu ( @vulda ) of Viettel Cyber Security (@vcslab) targeting OpenAI Codex in the Coding Agent category for a total of $40,000 and 4 Master of Pwn points

Orange Tsai (@orange_8361) of DEVCORE Research Team (@d3vc0r3) targeting Microsoft Edge – Sandbox Escape in the Web Browser category for a total of $175,000 and 17.5 Master of Pwn points

Thursday, May 14 - 1130

k3vg3n targeting LiteLLM in the Local Inference category for a total of $40,000 and 4 Master of Pwn points

Satoki Tsuji (@satoki00) / Ikotas Labs, Inc. targeting Megatron Bridge in the NVIDIA category for a total of $20,000 and 2 Master of Pwn points

Thursday, May 14 - 1300

Angelboy (@scwuaptx) of DEVCORE Research Team and TwinkleStar03 (@_twinklestar03), working with DEVCORE Internship Program targeting Microsoft Windows 11 in the Local Escalation of Privilege category for a total of $30,000 and 3 Master of Pwn points

Emanuele Barbeno, Cyrill Bannwart, Yves Bieri, Lukasz D., Urs Mueller of Compass Security (@compasssecurity) targeting OpenAI Codex in the Coding Agent category for a total of $40,000 and 4 Master of Pwn points

Park Jae Min (@hiariz) targeting Oracle Autonomous AI Database in the AI Database category for a total of $40,000 and 4 Master of Pwn points

Thursday, May 14 - 1400

Satoki Tsuji (@satoki00) / Ikotas Labs, Inc. targeting LiteLLM in the Local Inference category for a total of $40,000 and 4 Master of Pwn points.

Yoseop kim(@pwning_me) targeting Megatron Bridge in the NVIDIA category for a total of $20,000 and 2 Master of Pwn points

Thursday, May 14 - 1500

Ben Koo (@kiddo_pwn) of Team DDOS targeting Mozilla Firefox – Renderer Only in the Web Browser category for a total of $50,000 and 5 Master of Pwn points

Interrupt Labs targeting NV Container Toolkit in the NVIDIA category for a total of $50,000 and 5 Master of Pwn points

Thursday, May 14 - 1530

maitai (@MaitaiThe) of Doyensec (@Doyensec) targeting OpenAI Codex in the Coding Agent category for a total of $40,000 and 4 Master of Pwn points

Thursday, May 14 - 1600

Billy (@st424204), Pan Zhenpeng(@Peterpan980927), Weiming Shi (@bestswngs) of STARLabs SG (@starlabs_sg) targeting LM Studio in the Local Inference category for a total of $40,000 and 4 Master of Pwn points

Marcin Wiązowski targeting Microsoft Windows 11 in the Local Escalation of Privilege category for a total of $30,000 and 3 Master of Pwn points

Thursday, May 14 - 1630

haehae (@haehaeYang) of Out Of Bounds targeting Chroma in the AI Database category for a total of $20,000 and 2 Master of Pwn points

Thursday, May 14 - 1730

chompie of IBM X-Force Offensive Research (XOR) targeting Red Hat Enterprise Linux for Workstations in the Local Escalation of Privilege category for a total of $20,000 and 2 Master of Pwn points

Yoseop Kim(@pwning_me) targeting Mozilla Firefox – Renderer Only in the Web Browser category for a total of $50,000 and 5 Master of Pwn points

Thursday, May 14 - 1800

@rewhiles of Viettel Cyber Security (@vcslab) targeting Anthropic Claude Code in the Coding Agent category for a total of $40,000 and 4 Master of Pwn points

Thursday, May 14 - 1830

Kentaro Kawane of GMO Cybersecurity by Ierae targeting Microsoft Windows 11 in the Local Escalation of Privilege category for a total of $30,000 and 3 Master of Pwn points

Qrious Secure (@qriousec) targeting LM Studio in the Local Inference category for a total of $40,000 and 4 Master of Pwn points

Thursday, May 14 - 1900

haehae (@haehaeYang) of Out of Bounds targeting Megatron Bridge in the NVIDIA category for a total of $20,000 and 2 Master of Pwn points

Back to top

DAY TWO

Friday, May 15 - 1030

Ben Koo (@kiddo_pwn) of Team DDOS targeting Red Hat Enterprise Linux for Workstations in the Local Escalation of Privilege category for a total of $20,000 and 2 Master of Pwn points

Stephen Fewer (Rapid7) targeting Microsoft SharePoint in the Server category for a total of $100,000 and 10 Master of Pwn points

Tao Yan (@Ga1ois) and Edouard Bochin (@le_douds) from Palo Alto Networks targeting Apple Safari – Renderer Only in the Web Browser category for a total of $75,000 and 7.5 Master of Pwn points

Friday, May 15 - 1130

Le Duc Anh Vu ( @vulda ) of Viettel Cyber Security (@vcslab) targeting Cursor in the Coding Agent category for a total of $30,000 and 3 Master of Pwn points

Nikolaos Mourousias (@deltaclock), Caue Obici (@caueobici) and Bruno Halltari (@BrunoModificato) of OtterSec targeting LM Studio in the Local Inference category for a total of $40,000 and 4 Master of Pwn points

Sina Kheirkhah (@SinSinology) of Summoning Team (@SummoningTeam). targeting Anthropic Claude Code in the Coding Agent category for a total of $40,000 and 4 Master of Pwn points

Friday, May 15 - 1300

Ruitong from the Abstract Team at the University of Colorado Boulder targeting Red Hat Enterprise Linux for Workstations in the Local Escalation of Privilege category for a total of $20,000 and 2 Master of Pwn points

Friday, May 15 - 1330

Kiyong Kwak of Kakaogames and Song Nuri of Samsung Electronics targeting Apple Safari – Renderer Only in the Web Browser category for a total of $75,000 and 7.5 Master of Pwn points

Orange Tsai (@orange_8361) of DEVCORE Research Team targeting Microsoft Exchange in the Server category for a total of $200,000 and 20 Master of Pwn points

Friday, May 15 - 1400

Sina Kheirkhah (@SinSinology) of Summoning Team (@SummoningTeam). targeting OpenAI Codex in the Coding Agent category for a total of $40,000 and 4 Master of Pwn points

Friday, May 15 - 1430

Billy (@st424204), Bruce Chen(@bruce30262), Pan Zhenpeng(@Peterpan980927), Weiming Shi (@bestswngs ) of STARLabs SG (@starlabs_sg) targeting Megatron Bridge in the NVIDIA category for a total of $20,000 and 2 Master of Pwn points

David Tae, Louis Hur of Out Of Bounds targeting Ollama in the Local Inference category for a total of $40,000 and 4 Master of Pwn points

Friday, May 15 - 1530

Team: Alon Ben Tsur (@iamgweej), Yahav Azran (@_yahav) targeting Red Hat Enterprise Linux for Workstations in the Local Escalation of Privilege category for a total of $20,000 and 2 Master of Pwn points

Friday, May 15 - 1600

@rewhiles of Viettel Cyber Security (@vcslab) targeting Mozilla Firefox – Renderer Only in the Web Browser category for a total of $50,000 and 5 Master of Pwn points

Siyeon Wi targeting Microsoft Windows 11 in the Local Escalation of Privilege category for a total of $30,000 and 3 Master of Pwn points

Friday, May 15 - 1630

Byung Young Yi (@yibarrack) of Out Of Bounds targeting LiteLLM in the Local Inference category for a total of $40,000 and 4 Master of Pwn points

Friday, May 15 - 1700

Emanuele Barbeno, Cyrill Bannwart, Yves Bieri, Lukasz D., Urs Mueller of Compass Security (@compasssecurity) targeting Cursor in the Coding Agent category for a total of $30,000 and 3 Master of Pwn points

Friday, May 15 - 1800

Daniel Cohen Hillel (@0xDACA) targeting NV Container Toolkit in the NVIDIA category for a total of $50,000 and 5 Master of Pwn points

Back to top

DAY THREE

Saturday, May 16 - 1100

Le Tran Hai Tung (@tacbliw), dungnm (@dungnm_) and hieuvd (@gr4ss341) of Viettel Cyber Security (@vcslab) targeting Microsoft Windows 11 in the Local Escalation of Privilege category for a total of $30,000 and 3 Master of Pwn points

Satoki Tsuji (@satoki00) / Ikotas Labs, Inc. targeting OpenAI Codex in the Coding Agent category for a total of $40,000 and 4 Master of Pwn points

Sina Kheirkhah (@SinSinology) of Summoning Team (@SummoningTeam). targeting Red Hat Enterprise Linux for Workstations in the Local Escalation of Privilege category for a total of $20,000 and 2 Master of Pwn points

Saturday, May 16 - 1330

Emanuele Barbeno, Cyrill Bannwart, Yves Bieri, Lukasz D., Urs Mueller of Compass Security (@compasssecurity) targeting Anthropic Claude Code in the Coding Agent category for a total of $40,000 and 4 Master of Pwn points

Hyunwoo Kim (@v4bel) targeting Red Hat Enterprise Linux for Workstations in the Local Escalation of Privilege category for a total of $20,000 and 2 Master of Pwn points

Team: Giuseppe Calì (@_gcali) of Summoning Team targeting VMware ESXi in the Virtualization category with the Cross-tenant Code Execution Addon add-on for a total of $200,000 and 20 Master of Pwn points

Saturday, May 16 - 1430

splitline (@_splitline_) of DEVCORE Research Team targeting Microsoft SharePoint in the Server category for a total of $100,000 and 10 Master of Pwn points

Saturday, May 16 - 1600

Byung Young Yi (@yibarrack) of Out Of Bounds targeting Anthropic Claude Code in the Coding Agent category for a total of $40,000 and 4 Master of Pwn points

Nguyen Hoang Thach (@hi_im_d4rkn3ss) of STARLabs SG (@starlabs_sg) targeting VMware ESXi in the Virtualization category with the Cross-tenant Code Execution Addon add-on for a total of $200,000 and 20 Master of Pwn points

Follow the action live! We’ll be posting real-time updates and results throughout the competition on our blog and across social media. Stay up to date by following us on Twitter, Mastodon, LinkedIn, and Bluesky, and join the conversation using #Pwn2Own Berlin and #P2OBerlin for continuous coverage. 

I’m currently in Berlin helping set up for Pwn2Own Berlin, but that doesn’t stop Patch Tuesday from coming, and it’s another big one. At least nothing is listed as being in the wild – for now. Take a break from your regularly scheduled activities and let’s take a look at the latest security patches from Adobe and Microsoft. Due to technical difficulties, there will not be a video companion for this month.

Adobe Patches for May 2026

For May, Adobe released 10 bulletins addressing 52 unique CVEs in Adobe Commerce, After Effects, Adobe Connect, Illustrator, Media Encoder, Premiere Pro, Substance 3D Painter, Substance 3D Sampler, Content Authenticity SDK, and the Adobe Substance 3D Designer. Here’s this month’s overview table:

Bulletin ID Product CVE Count Highest Severity Highest CVSS Exploited Deployment Priority APSB26-49 Adobe Commerce 15 Critical 8.7 No 2 APSB26-48 Adobe After Effects 4 Critical 7.8 No 3 APSB26-50 Adobe Connect 2 Critical 9.6 No 3 APSB26-51 Adobe Illustrator 4 Critical 7.8 No 3 APSB26-47 Adobe Media Encoder 2 Critical 7.8 No 3 APSB26-46 Adobe Premiere Pro 3 Critical 7.8 No 3 APSB26-55 Adobe Substance 3D Painter 2 Critical 7.8 No 3 APSB26-54 Adobe Substance 3D Sampler 1 Critical 7.8 No 3 APSB26-53 Content Authenticity SDK 14 Critical 7.5 No 3 APSB26-52 Adobe Substance 3D Designer 5 Important 6.3 No 3 TOTAL 10 bulletins 52

The obvious priority this month is the patch for Commerce, with its 15 bugs and deployment priority of 2. The Connect fix should also rank up there since both of its CVEs are CVSS 9s. Beyond those, it’s a pretty typical month for Adobe, with most of the bugs either being cross-site scripting (XSS) or open-and-own code executions.

Microsoft Patches for May 2026

This month, Microsoft released a whopping 138 new CVEs in Windows and Windows components, Office and Office Components, Microsoft Edge (Chromium-based), Azure, .NET and Visual Studio, Copilot Chat, Github Copilot, M365 Copilot, SQL Server, TCP/IP, and the Telnet Client – yes, the Telnet client. Two of these bugs were reported through the TrendAI ZDI program. 30 of these bugs are rated Critical, three are rated as Moderate, one is rated Low, and the rest are rated Important in severity.

This large volume of fixes follows the largest monthly release in Microsoft’s history and reflects the trend across the industry of a high number of submissions. While not all of these bugs were found by AI, it’s likely they had an AI-related component – even if it was just AI writing the submission. I should also point out the Pwn2Own Berlin occurs in just a few days, and it’s typical for vendors to patch as much as they can before the event.

None of the bugs patched by Microsoft this month are listed as publicly known or under active attack at the time of release, so we’ve got that going for us. Let’s take a closer look at some of the more interesting updates for this month, starting with a nasty-looking bug in DNS:

-    CVE-2026-41096 - Windows DNS Client Remote Code Execution Vulnerability
This patch fixes a heap-based buffer overflow in the DNS Client triggered by a malicious DNS response. No authentication or user interaction needed, and since the DNS Client runs on virtually every Windows machine, the attack surface is enormous. An attacker with a position to influence DNS responses (MitM, rogue server) could achieve unauthenticated RCE across your enterprise.

-    CVE-2026-41089 - Windows Netlogon Remote Code Execution Vulnerability
This update covers another CVSS 9.8 bug, which is a stack-based buffer overflow that lets an unauthenticated remote attacker execute code on a domain controller by sending a specially crafted network request — no credentials, no user interaction required. Yup – that makes it wormable. This is the highest-impact bug that requires immediate patching: a compromised domain controller is a compromised domain.

-    CVE-2026-42898 - Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability
This bug rates a CVSS 9.9(!) and represents a code injection in Dynamics 365. It allows any authenticated user to execute code with a scope change, meaning exploitation can break out and affect resources beyond the vulnerable component itself. Scope changes are pretty rare, so if you’re running Dynamics 365 On-Prem, definitely test and deploy this patch quickly.

-    CVE-2026-40415 - Windows TCP/IP Remote Code Execution Vulnerability
This bug in the TCP/IP stack results from a use-after-free (UAF) and could allow a remote, unauthenticated threat actor to execute code without user interaction. That makes this another wormable bug. However, this one is much less likely to be exploited. The target needs to be under sustained low-memory (memory pressure) conditions, which is pretty rare. Still, no need to tempt fate here. Test and deploy this one quickly.

Here’s the full list of CVEs released by Microsoft for May 2026:

CVE Title Severity CVSS Public Exploited Type CVE-2026-35435 Azure AI Foundry Elevation of Privilege Vulnerability Critical 8.6 No No EoP CVE-2026-35428 Azure Cloud Shell Spoofing Vulnerability Critical 9.6 No No Spoofing CVE-2026-42826 Azure DevOps Information Disclosure Vulnerability Critical 10 No No Info CVE-2026-32207 Azure Machine Learning Notebook Spoofing Vulnerability Critical 8.8 No No Spoofing CVE-2026-33109 Azure Managed Instance for Apache Cassandra Remote Code Execution Vulnerability Critical 9.9 No No RCE CVE-2026-33844 Azure Managed Instance for Apache Cassandra Remote Code Execution Vulnerability Critical 9 No No RCE CVE-2026-41105 Azure Monitor Action Group Notification System Elevation of Privilege Vulnerability Critical 8.1 No No EoP CVE-2026-33111 Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability Critical 7.5 No No Info CVE-2026-26129 M365 Copilot Information Disclosure Vulnerability Critical 7.5 No No Info CVE-2026-26164 M365 Copilot Information Disclosure Vulnerability Critical 7.5 No No Info CVE-2026-33821 Microsoft Dynamics 365 Customer Insights Elevation of Privilege Vulnerability Critical 7.7 No No EoP CVE-2026-42898 Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability Critical 9.9 No No RCE CVE-2026-40379 Microsoft Enterprise Security Token Service (ESTS) Spoofing Vulnerability Critical 9.3 No No Spoofing CVE-2026-40363 Microsoft Office Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-40358 Microsoft Office Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-34327 Microsoft Partner Center Spoofing Vulnerability Critical 8.2 No No Spoofing CVE-2026-40365 Microsoft SharePoint Server Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-41103 Microsoft SSO Plugin for Jira & Confluence Elevation of Privilege Vulnerability Critical 9.1 No No EoP CVE-2026-33823 Microsoft Team Events Portal Information Disclosure Vulnerability Critical 9.6 No No Info CVE-2026-40364 Microsoft Word Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-40366 Microsoft Word Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-40361 Microsoft Word Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-40367 Microsoft Word Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-42831 Office for Android Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-41096 Windows DNS Client Remote Code Execution Vulnerability Critical 9.8 No No RCE CVE-2026-35421 Windows GDI Remote Code Execution Vulnerability Critical 7.8 No No RCE CVE-2026-40403 Windows Graphics Component Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-40402 Windows Hyper-V Elevation of Privilege Vulnerability Critical 9.3 No No EoP CVE-2026-32161 Windows Native WiFi Miniport Driver Remote Code Execution Vulnerability Critical 7.5 No No RCE CVE-2026-41089 Windows Netlogon Remote Code Execution Vulnerability Critical 9.8 No No RCE CVE-2026-32175 .NET Core Tampering Vulnerability Important 4.3 No No Tampering CVE-2026-32177 .NET Elevation of Privilege Vulnerability Important 7.3 No No EoP CVE-2026-35433 .NET Elevation of Privilege Vulnerability Important 7.3 No No EoP CVE-2025-54518 * AMD: CVE-2025-54518 CPU OP Cache Corruption Important No No RCE CVE-2026-42899 ASP.NET Core Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-40381 Azure Connected Machine Agent Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-42823 † Azure Logic Apps Elevation of Privilege Vulnerability Important 9.9 No No EoP CVE-2026-33833 Azure Machine Learning Notebook Spoofing Vulnerability Important 8.2 No No Spoofing CVE-2026-32204 Azure Monitor Agent Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-42830 Azure Monitor Agent Metrics Extension Elevation of Privilege Vulnerability Important 6.5 No No EoP CVE-2026-33117 Azure SDK for Java Security Feature Bypass Vulnerability Important 9.1 No No SFB CVE-2026-41109 GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability Important 8.8 No No SFB CVE-2026-35424 Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-41614 M365 Copilot for Desktop Spoofing Vulnerability Important 6.2 No No Spoofing CVE-2026-41100 Microsoft 365 Copilot for Android Spoofing Vulnerability Important 4.4 No No Spoofing CVE-2026-40377 Microsoft Cryptographic Services Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-41094 Microsoft Data Formulator Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-40417 Microsoft Dynamics 365 Business Central Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-42833 Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability Important 9.1 No No RCE CVE-2026-42838 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability Important 5.4 No No EoP CVE-2026-40360 Microsoft Excel Information Disclosure Vulnerability Important 7.8 No No Info CVE-2026-40359 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-40362 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-42832 Microsoft Excel Spoofing Vulnerability Important 7.7 No No Spoofing CVE-2026-34329 Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-40419 Microsoft Office Click-To-Run Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-40418 Microsoft Office Click-To-Run Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-35436 Microsoft Office Click-To-Run Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-40420 Microsoft Office Click-To-Run Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-42893 Microsoft Outlook for iOS Tampering Vulnerability Important 7.4 No No Tampering CVE-2026-40374 Microsoft Power Automate Desktop Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-41102 Microsoft PowerPoint for Android Spoofing Vulnerability Important 7.1 No No Spoofing CVE-2026-35439 Microsoft SharePoint Server Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-40368 Microsoft SharePoint Server Remote Code Execution Vulnerability Important 8 No No RCE CVE-2026-33110 Microsoft SharePoint Server Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-33112 Microsoft SharePoint Server Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-40357 Microsoft SharePoint Server Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-32185 Microsoft Teams Spoofing Vulnerability Important 5.5 No No Spoofing CVE-2026-41101 Microsoft Word for Android Spoofing Vulnerability Important 7.1 No No Spoofing CVE-2026-35440 Microsoft Word Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-40421 Microsoft Word Information Disclosure Vulnerability Important 4.3 No No Info CVE-2026-41097 Secure Boot Security Feature Bypass Vulnerability Important 6.7 No No SFB CVE-2026-40370 † SQL Server Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-41613 Visual Studio Code Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-41612 Visual Studio Code Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-41611 Visual Studio Code Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-41610 Visual Studio Code Security Feature Bypass Vulnerability Important 6.3 No No SFB CVE-2026-33839 Win32k Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-33840 Win32k Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34330 Win32k Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34331 Win32k Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-35423 Windows 11 Telnet Client Information Disclosure Vulnerability Important 5.4 No No Info CVE-2026-35438 Windows Admin Center Elevation of Privilege Vulnerability Important 8.3 No No EoP CVE-2026-41086 Windows Admin Center in Azure Portal Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-34344 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34345 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-35416 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-41088 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34343 Windows Application Identity (AppID) Subsystem Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-35418 Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-33835 Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34337 Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-40407 Windows Common Log File System Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-40397 Windows Common Log File System Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-42896 Windows DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-35419 Windows DWM Core Library Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-34336 Windows DWM Core Library Information Disclosure Vulnerability Important 7.8 No No Info CVE-2026-33834 Windows Event Logging Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32209 Windows Filtering Platform (WFP) Security Feature Bypass Vulnerability Important 4.4 No No SFB CVE-2026-33841 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-35420 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-40369 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34332 Windows Kernel-Mode Driver Remote Code Execution Vulnerability Important 8 No No RCE CVE-2026-34339 Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability Important 5.5 No No DoS CVE-2026-34341 Windows Link-Layer Discovery Protocol (LLDP) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-33838 Windows Message Queuing (MSMQ) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34342 Windows Print Spooler Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-41095 Windows Projected File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34340 Windows Projected File System Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-40398 Windows Remote Desktop Services Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-21530 Windows Rich Text Edit Elevation of Privilege Vulnerability Important 6.7 No No EoP CVE-2026-32170 Windows Rich Text Edit Elevation of Privilege Vulnerability Important 6.7 No No EoP CVE-2026-40410 Windows SMB Client Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-35415 Windows Storage Spaces Controller Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34350 Windows Storport Miniport Driver Denial of Service Vulnerability Important 6.5 No No DoS CVE-2026-40405 Windows TCP/IP Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-40414 Windows TCP/IP Denial of Service Vulnerability Important 7.4 No No DoS CVE-2026-40401 Windows TCP/IP Denial of Service Vulnerability Important 6.2 No No DoS CVE-2026-40413 Windows TCP/IP Denial of Service Vulnerability Important 7.4 No No DoS CVE-2026-35422 Windows TCP/IP Driver Security Feature Bypass Vulnerability Important 6.5 No No SFB CVE-2026-34351 Windows TCP/IP Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-40399 Windows TCP/IP Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34334 Windows TCP/IP Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-40406 Windows TCP/IP Information Disclosure Vulnerability Important 7.5 No No Info CVE-2026-33837 Windows TCP/IP Local Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-40415 Windows TCP/IP Remote Code Execution Vulnerability Important 8.1 No No RCE CVE-2026-42825 Windows Telephony Service Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-34338 Windows Telephony Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-40382 Windows Telephony Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-40380 Windows Volume Manager Extension Driver Remote Code Execution Vulnerability Important 6.2 No No RCE CVE-2026-40408 Windows WAN ARP Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34333 Windows Win32k Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-34347 Windows Win32k Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-35417 Windows Win32k Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-42891 Microsoft Edge (Chromium-based) for Android Spoofing Vulnerability Moderate 6.5 No No Spoofing CVE-2026-35429 Microsoft Edge (Chromium-based) for Android Spoofing Vulnerability Moderate 4.3 No No Spoofing CVE-2026-41107 Microsoft Edge (Chromium-based) Information Disclosure Vulnerability Moderate 7.4 No No Info CVE-2026-40416 Microsoft Edge (Chromium-based) for Android Spoofing Vulnerability Low 4.3 No No Spoofing

* Indicates this CVE had been released by a third party and is now being included in Microsoft releases.

† Indicates further administrative actions are required to fully address the vulnerability.

 

Looking at the other Critical-rated bugs in this month’s release, there are quite a few scary-looking bugs (including a CVSS 10!), but there’s no action for the end user as Microsoft has already mitigated these bugs and is just now documenting them. There’s also this month’s crop of Office bugs where the Preview Pane is an attack vector. However, the bug in Office for Android does not have the Preview Pane vector; it’s simple open and own. The bug in the WiFi driver needs a network adjacent attacker. The SharePoint bug requires authentication, but anyone with site privileges has the authentication needed. The bug in SSO Plugin for Jira & Confluence should really be called an authentication bypass, since it allows an unauthenticated attacker to gain access to a system.

Looking at the other code execution bugs, most are of the open and own variety as expected. The bug in Dynamic 365 (On Prem) requires high privileges. The Message Queueing bug requires an adjacent attacker. The bug in SQL Server requires authentication, but as usual, patching won’t be straightforward. Finally, there’s a bug in the kernel that leads to code execution. Most kernel bugs are privilege escalations, but this one could allow code execution if an attacker sends specially crafted NVMe over Fabrics (NVMe‑oF) response messages during the connection handshake process that contains an invalid header length value. Neat.

As usual, the vast majority of the Microsoft release fixes Elevation of Privilege (EoP) bugs. Also as usual, most simply lead to local attackers executing their code at SYSTEM-level privileges or administrative privileges, so there’s not much to add without further technical details about the bugs themselves. There are also a few bugs that just state the attacker could “gain ELEVATED privileges.” How obtuse. The bugs in Azure allow an attacker to access data otherwise hidden from them. The Edge bug allows threat actors to elevate to the privileges of the running application. The bug in Visual Studio allows attackers to get permissions associated with the MCP Server’s managed identity. Finally, there are a couple of sandbox escapes, too, which are always useful.

This month's update includes six Security Feature Bypass vulnerabilities. The most severe is in the Azure SDK for Java (CVSS 9.1). An attacker over the network can bypass the integrity protection provided by authentication tags on encrypted data, effectively manipulating encrypted input in a way that slips past integrity checks during decryption. Close behind is the bypass affecting the GitHub Copilot integration in Visual Studio Code (CWE-74). This one requires a user interaction, but it allows an attacker to circumvent the path validation safeguards that normally control which files Copilot is permitted to modify. The other Visual Studio Code bypass involves cross-site scripting, improper link resolution, and information exposure triggered when a user opens or views a maliciously crafted notebook. On the Windows networking side there are two bypasses. The first hits the Windows TCP/IP driver via an authentication bypass using an alternate channel. The other impacts the Windows Filtering Platform through improper access control, allowing a local, low-privileged attacker to bypass FQDN-based network security rules. Finally, there’s a Secure Boot bypass that, you guessed it, bypasses secure boot features.

Moving on to the Information Disclosure bugs fixed this month, we have 15 different CVEs. As usual, the majority of these simply result in info leaks consisting of unspecified memory contents or memory addresses. The bug in Power Automate could expose data marked “Sensitive” within Power Automate Desktop flows. One of the Word bugs could disclose NLTM hashes. The bug in Edge could disclose your cookies, which seems rude. The bug in Visual Studio could expose file path information. Finally, there’s a bug in Telnet for Windows 11 that leaks information being used by Telnet at the time. I didn’t even realize Windows 11 still had a telnet client.

The May release contains 10 spoofing bugs (plus the ones already addressed by Microsoft). The bug in Azure Machine Learning Notebooks vulnerability requires user interaction, but it could expose info through the Azure ML web interface to the attacker. There’s a cluster of fixes for Microsoft's mobile Office suite on Android. Excel, Word, and PowerPoint for Android all carry spoofing flaws rooted in improper access control. Two Copilot products are also affected by spoofing vulns. The M365 Copilot for Desktop has no details provided. The M365 Copilot for Android variant requires low privileges and producing only limited impact on confidentiality and integrity. Microsoft Teams for Android rounds out the mobile app spoofing bugs. Three Edge bugs close things out, all involving misrepresentation of information in the browser UI.

There are two Tampering bugs in this month’s release. The one in .NET Core allows threat actors to write files to an affected system. The other is in Outlook for iOS and manifests as a command injection bug.

There are eight DoS bugs in the May release, but as always, Microsoft provides little to no actionable information about the vulnerabilities. The most interesting from a practical standpoint are two TCP/IP bugs that allow a low-privilege Hyper-V guest to crash the host. Both are triggered from the adjacent network. On the broader network-exposure side, the ASP.NET Core bug is a straightforward infinite loop condition — an unauthenticated attacker sends a crafted request over the network and the server stops responding.

No new advisories are being released this month.

Looking Ahead

Assuming I survive Pwn2Own Berlin (which is looking iffy at the moment), I’ll return on June 9th on what will hopefully be a smaller release than this one. Until then, stay safe, happy patching, and may all your reboots be smooth and clean!

We’ve received some feedback from those who read the Patch Blog that they would like something similar for macOS updates. Unfortunately, Apple doesn’t schedule these for a particular day, but we can provide our thoughts and analysis on the days they do release their latest patches.

For May 2026, Apple released 82 unique CVEs across the three macOS versions: 79 for macOS Tahoe 26.5, 45 for macOS Sequoia 15.7.7, and 42 for macOS Sonoma 14.8.7. Since Apple doesn’t provide CVSS scores or other severity information, we’re left to speculate on which of these bugs is the most severe. However, there are a couple that stand out.

-              CVE-2026-28819 (Wi-Fi) stands out as the strongest candidate for the most severe as it states, “An app may be able to execute arbitrary code with kernel privileges.” The combination of arbitrary code execution at the kernel level is about as bad as it gets on a severity scale. Plus, it affects all three macOS versions (Tahoe, Sequoia, and Sonoma).

-              CVE-2026-43668 (mDNSResponder) also piques my interest since, “A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.” The remote attack vector with kernel memory corruption on all three OS versions makes this a serious one, especially since mDNSResponder is always running.

-              CVE-2026-28972 (Kernel) This one states that “An app may be able to cause unexpected system termination or write kernel memory.” An out-of-bounds write directly into kernel memory on all three OS versions. This one may also have implications in the upcoming Pwn2Own Berlin contest.

Here’s a look at all the bugs released by Apple this month:

82Unique CVEs 79macOS Tahoe 26.5 45macOS Sequoia 15.7.7 42macOS Sonoma 14.8.7 CVE ID Component Impact macOS Tahoe 26.5 macOS Sequoia 15.7.7 macOS Sonoma 14.8.7 CVE-2026-28991 Accelerate An app may be able to cause a denial-of-service Yes No No CVE-2026-28988 Accounts An app may be able to bypass certain Privacy preferences Yes No No CVE-2026-28959 APFS An app may be able to cause unexpected system termination Yes Yes Yes CVE-2026-28995 App Intents A malicious app may be able to break out of its sandbox Yes No No CVE-2026-1837 AppleJPEG Processing a maliciously crafted image may lead to a denial-of-service Yes No No CVE-2026-28956 AppleJPEG Processing a maliciously crafted media file may lead to unexpected app termination or corrupt process memory Yes Yes Yes CVE-2026-39869 Audio Processing an audio stream in a maliciously crafted media file may terminate the process Yes Yes Yes CVE-2026-28922 CoreMedia An app may be able to access private information Yes Yes Yes CVE-2026-28936 CoreServices Processing a maliciously crafted file may lead to unexpected app termination Yes No Yes CVE-2026-28918 CoreSymbolication Parsing a maliciously crafted file may lead to an unexpected app termination Yes No No CVE-2026-28878 Crash Reporter An app may be able to enumerate a user's installed apps No Yes No CVE-2026-28915 CUPS An app may be able to gain root privileges Yes Yes Yes CVE-2026-43659 FileProvider An app may be able to access sensitive user data Yes Yes Yes CVE-2026-28923 GPU Drivers A malicious app may be able to break out of its sandbox Yes Yes Yes CVE-2026-28925 HFS An app may be able to cause unexpected system termination or write kernel memory Yes Yes Yes CVE-2025-43524 Icons An app may be able to break out of its sandbox No Yes Yes CVE-2026-43661 ImageIO Processing a maliciously crafted image may corrupt process memory Yes No No CVE-2026-28977 ImageIO Processing a maliciously crafted file may lead to unexpected app termination Yes Yes Yes CVE-2026-28990 ImageIO Processing a maliciously crafted image may corrupt process memory Yes Yes Yes CVE-2026-28978 Installer A malicious app may be able to break out of its sandbox Yes Yes Yes CVE-2026-28992 IOHIDFamily An attacker may be able to cause unexpected app termination Yes Yes Yes CVE-2026-28943 IOHIDFamily An app may be able to determine kernel memory layout Yes Yes Yes CVE-2026-28969 IOKit An app may be able to cause unexpected system termination Yes Yes Yes CVE-2026-43655 IOSurfaceAccelerator An app may be able to cause unexpected system termination or read kernel memory Yes No No CVE-2026-43654 Kernel An app may be able to disclose kernel memory Yes Yes Yes CVE-2026-28908 Kernel An app may be able to modify protected parts of the file system Yes Yes Yes CVE-2026-28954 Kernel A maliciously crafted disk image may bypass Gatekeeper checks Yes Yes Yes CVE-2026-28897 Kernel A local user may be able to cause unexpected system termination or read kernel memory Yes Yes Yes CVE-2026-28952 Kernel An app may be able to cause unexpected system termination Yes Yes Yes CVE-2026-28951 Kernel An app may be able to gain root privileges Yes Yes Yes CVE-2026-28972 Kernel An app may be able to cause unexpected system termination or write kernel memory Yes Yes Yes CVE-2026-28986 Kernel An app may be able to cause unexpected system termination Yes Yes Yes CVE-2026-28987 Kernel An app may be able to leak sensitive kernel state Yes Yes Yes CVE-2026-28983 LaunchServices A remote attacker may be able to cause a denial of service Yes No No CVE-2026-28929 Mail Drafts Replying to an email could display remote images in Mail in Lockdown Mode Yes Yes Yes CVE-2026-43653 mDNSResponder An attacker on the local network may be able to cause a denial-of-service Yes No Yes CVE-2026-28985 mDNSResponder An attacker on the local network may be able to cause a denial-of-service Yes No No CVE-2026-43668 mDNSResponder A remote attacker may be able to cause unexpected system termination or corrupt kernel memory Yes Yes Yes CVE-2026-43666 mDNSResponder An attacker on the local network may be able to cause a denial-of-service Yes Yes Yes CVE-2026-28941 Model I/O Processing a maliciously crafted file may lead to a denial-of-service or potentially disclose memory contents Yes Yes No CVE-2026-28940 Model I/O Processing a maliciously crafted image may corrupt process memory Yes Yes No CVE-2026-28961 Network Extensions An attacker with physical access to a locked device may be able to view sensitive user information Yes No No CVE-2026-28906 Networking An attacker may be able to track users through their IP address Yes Yes Yes CVE-2026-28840 PackageKit An app may be able to gain root privileges No Yes Yes CVE-2026-43656 Quick Look Parsing a maliciously crafted file may lead to an unexpected app termination Yes Yes Yes CVE-2026-43652 Sandbox An app may be able to access protected user data Yes No No CVE-2026-39870 SceneKit Processing a maliciously crafted image may corrupt process memory Yes Yes Yes CVE-2026-28846 SceneKit A remote attacker may be able to cause unexpected app termination Yes Yes Yes CVE-2026-28993 Shortcuts An app may be able to access user-sensitive data Yes Yes Yes CVE-2026-28848 SMB A remote attacker may be able to cause unexpected system termination Yes Yes No CVE-2026-28930 Spotlight An app may be able to access protected user data Yes No No CVE-2026-28974 Spotlight An app may be able to cause a denial-of-service Yes Yes No CVE-2026-28996 Storage An app may be able to access sensitive user data Yes Yes Yes CVE-2026-28919 StorageKit An app may be able to gain root privileges Yes Yes Yes CVE-2026-28924 Sync Services An app may be able to access Contacts without user consent Yes Yes Yes CVE-2026-39871 TV App An app may be able to observe unprotected user data Yes Yes Yes CVE-2026-28976 UserAccountUpdater An app may be able to gain root privileges Yes No No CVE-2026-43660 WebKit Processing maliciously crafted web content may prevent Content Security Policy from being enforced Yes No No CVE-2026-28907 WebKit Processing maliciously crafted web content may prevent Content Security Policy from being enforced Yes No No CVE-2026-28962 WebKit Processing maliciously crafted web content may disclose sensitive user information Yes No No CVE-2026-43658 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash Yes No No CVE-2026-28905 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28847 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28904 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28955 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28903 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28953 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28902 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28901 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28913 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28883 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28958 WebKit An app may be able to access sensitive user data Yes No No CVE-2026-28917 WebKit Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28947 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash Yes No No CVE-2026-28946 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash Yes No No CVE-2026-28942 WebKit Processing maliciously crafted web content may lead to an unexpected Safari crash Yes No No CVE-2026-28971 WebKit A malicious iframe may use another website's download settings Yes No No CVE-2026-28944 WebRTC Processing maliciously crafted web content may lead to an unexpected process crash Yes No No CVE-2026-28819 Wi-Fi An app may be able to execute arbitrary code with kernel privileges Yes Yes Yes CVE-2026-28994 Wi-Fi An attacker in a privileged network position may be able to perform denial-of-service attack using crafted Wi-Fi packets Yes Yes Yes CVE-2026-28914 zip A maliciously crafted ZIP archive may bypass Gatekeeper checks Yes No No CVE-2026-28920 zlib Visiting a maliciously crafted website may leak sensitive data Yes Yes Yes CVEs marked with the scarab logo were reported through the TrendAI Zero Day Initiative program.

We’ll continue these macOS updates if people find them useful. Stay tuned for the regularly schedule Patch Tuesday blog covering Adobe and Microsoft.

In this excerpt of a TrendAI Research Services vulnerability report, Richard Chen and Lucas Miller of the TrendAI Research team detail a recently patched double free vulnerability in the Windows Internet Key Exchange (IKE) service. This bug was originally discovered by WARP & MORSE team at Microsoft. Successful exploitation could result in a crash of the IKEEXT service, or potentially arbitrary code execution. The following is a portion of their write-up covering CVE-2026-33824, with a few minimal modifications.

A double free vulnerability has been reported in the Windows Internet Key Exchange (IKEv2) service. The vulnerability is due to an error when processing fragments.

An unauthenticated, remote attacker could exploit this vulnerability by sending crafted packets to the target server. Successful exploitation could result in a crash of the IKEEXT service, or potentially arbitrary code execution.

The Vulnerability

Microsoft Windows is an operating system which includes both server and desktop components along with an easy-to-use GUI. All currently supported versions of Windows include Internet Key Exchange Protocol Extensions to support the Virtual Private Network (VPN) feature.

The VPN feature of Windows encrypts communication between hosts. ISAKMP is a negotiation protocol used by IPsec-enabled hosts to build a security association. It uses the Internet Key Exchange (IKE) Protocol in order to negotiate keys for encrypted communication. IKE has two versions: IKEv1 and IKEv2. IKE version 1 (IKEv1) and version 2 (IKEv2) messages have the following general format:

The type of payload is determined by the Next Payload header of the previous payload, or the Next Payload field in the header (in the case of the first payload).

IKEv2 supports message fragmentation as defined in RFC 7383. When IKEv2 messages exceed the path MTU, they may be split into multiple Encrypted Fragment payloads. Of interest to this report is the Encrypted Fragment (SKF) payload (type 0x35). The SKF payload format is defined as:

When an IKEv2 implementation receives fragments, it inserts each fragment into an ordered list and reassembles them once all fragments have been received. In the Windows implementation, the function IkeReinjectReassembledPacket() performs this reassembly.

A double-free vulnerability has been reported in the Windows IKE Extension library (ikeext.dll). The vulnerability is due to improper ownership handling of a heap-allocated blob pointer during IKEv2 fragment reassembly. During the IKE_SA_INIT exchange, a Security Realm Vendor ID payload causes IkeHandleSecurityRealmVendorId() to allocate a blob and store it in the MMSA (Main Mode Security Association) structure at offset 0x208. When a fragmented IKE_AUTH message is fully reassembled, IkeReinjectReassembledPacket copies MMSA fields at offsets 0x178 through 0x21F - including the blob pointer at 0x208 - into a local stack struct. This struct is then passed to IkeQueueRecvRequest, which shallow-copies it into a heap-allocated work item. While IkeQueueRecvRequest deep-copies the reassembly buffer at offset 0x10 in the struct, the Security Realm blob pointer at offset 0xC8 remains a shallow copy, aliasing the original at MMSA+0x208.

When the thread pool processes the queued work item, IkeDestroyPacketContext checks the blob pointer at offset 0xC8 and calls WfpMemFree to release it (first free). The MMSA structure still holds the original pointer to the same allocation at offset 0x208. When the MMSA is subsequently cleaned up through IkeCleanupMMNegotiation, the SA reference count is decremented via IkeDerefMMSA, eventually triggering IkeFreeMMSA, which frees the blob pointer at MMSA offset 0x208 - the same allocation already freed by IkeDestroyPacketContext (second free).

A remote, unauthenticated attacker could exploit this vulnerability by sending a crafted IKE_SA_INIT message followed by two or more Encrypted Fragment (SKF) payloads containing an invalid IKE_AUTH message to the target server. The fragment reassembly path will shallow-copy the blob pointers, and the subsequent MMSA cleanup will trigger the double free. Successful exploitation could result in arbitrary code execution under the security context of the IKEEXT service (SYSTEM).

Source Code Walkthrough

The following code snippets were taken from IKEEXT.DLL file version 10.0.20348.2849 and decompiled with IDA Pro version 8.3. Comments added by TrendAI have been highlighted.

Detection Guidance

To detect an attack exploiting this vulnerability, the detection device must monitor and parse traffic on UDP ports 500 and 4500. The IKE general format, Payloads field, and the Encrypted Fragment (SKF) payload format can be seen above.

The detection device should monitor all incoming IKE traffic. Detection requires correlating two packets within the same IKE session: an IKE_SA_INIT request carrying the Microsoft Security Realm Vendor ID, followed by a fragmented IKE_AUTH request. Neither packet alone is malicious; both must be observed in sequence from the same source.

IKE_SA_INIT

At byte offset 17 of the UDP payload, the device should check for the three-byte sequence 20 22 08, which corresponds to the IKEv2 version identifier (0x20), the IKE_SA_INIT exchange type (0x22), and the Initiator flag (0x08). The device should then scan the remainder of the packet for the 16-byte sequence 68 6a 8c bd fe 63 4b 40 51 46 fb 2b af 33 e9 e8, which is the Microsoft Security Realm Vendor ID. If both conditions are met, the device should follow the guidance below.

IKE_AUTH

For subsequent packets from the same source, the device should check bytes at offset 16 through 23 of the UDP payload. At offset 16, the four-byte sequence 35 20 23 08 identifies an Encrypted Fragment payload (SKF, type 0x35), IKEv2 version (0x20), IKE_AUTH exchange type (0x23), and Initiator flag (0x08). If found, the detection device should inspect offset 20 and search for the four-byte sequence00 00 00 01. If found the traffic should be considered malicious; an attack exploiting this vulnerability is likely underway.

Notes
• All multi-byte values should be treated as big endian.
• When detecting traffic on port 4500, IKE packets are prepended by a 4-byte non-ESP marker (\x00\x00\x00\x00), shifting all IKE header content offsets by 4.

Conclusion

This vulnerability was patched by Microsoft in the April 2026 release cycle. They do note two mitigations that could prevent exploitation while the patch is being tested and deployed. 

·      Block inbound traffic on UDP ports 500 and 4500 for systems that do not use IKE.

·      For systems that require IKE, configure firewall rules to allow inbound traffic on UDP ports 500 and 4500 only from known peer addresses.

These mitigations may be removed once the security patch is applied. The only way to fully remediate the vulnerability is to apply the update from the vendor.

Special thanks to Richard Chen and Lucas Miller of the TrendAI Research team for providing such a thorough analysis of this vulnerability. For an overview of TrendAI Research services please visit https://go.trendmicro.com/tis/vulnerabilities.html.

The threat research team will be back with other great vulnerability analysis reports in the future. Until then, follow the team on Twitter, Mastodon, LinkedIn, or Bluesky for the latest in exploit techniques and security patches.

It’s time once again for Patch Tuesday, and this one is huge. We’ve also got multiple exploits in the wild, which adds another layer of urgency to this month’s release. Take a break from your regularly scheduled activities, and let’s take a look at the latest security patches from Adobe and Microsoft. If you’d rather watch the full video recap covering the entire release, you can check it out here:

Adobe Patches for April 2026

For April, Adobe released 12 bulletins addressing 61 unique CVEs in Adobe Acrobat Reader, InDesign, InCopy, FrameMaker, Connect, ColdFusion, Bridge, Photoshop, Illustrator, Experience Manager Screens, and the Adobe DNG SDK. Three of the Cold Fusion bugs came through the TrendAI ZDI program. For this month, I’m introducing an Adobe table as well. I’d love to get your feedback on whether this is helpful.

Bulletin ID Product CVE Count Highest Severity Highest CVSS Exploited Deployment Priority APSB26-43 Adobe Acrobat Reader 1 Critical 8.6 Yes 1 APSB26-44 Adobe Acrobat Reader 2 Critical 8.6 No 2 APSB26-32 Adobe InDesign 9 Critical 7.8 No 3 APSB26-33 Adobe InCopy 2 Critical 7.8 No 3 APSB26-36 Adobe FrameMaker 11 Critical 8.6 No 3 APSB26-37 Adobe Connect 9 Critical 9.6 No 3 APSB26-38 Adobe ColdFusion 7 Critical 9.3 No 1 APSB26-39 Adobe Bridge 6 Critical 7.8 No 3 APSB26-40 Adobe Photoshop 1 Critical 7.8 No 3 APSB26-42 Adobe Illustrator 1 Critical 7.8 No 3 APSB26-34 Adobe Experience Manager Screens 9 Important 5.4 No 3 APSB26-41 Adobe DNG SDK 3 Important 5.5 No 3

Obviously, the active attack in Reader is the highest priority for this month, but don’t ignore the second bunch of Reader patches. Cold Fusion also gets a deployment priority of 1, so if you’re still running that platform, make sure you get the update. Otherwise, the FrameMaker and Connect patches fix 11 and nine bugs, respectively. InDesign and Experience Manager Screens also have nine CVEs addressed.

Outside of the Reader bug, none of the other bugs fixed by Adobe this month are listed as publicly known or under active attack at the time of release. One of the Reader bugs and Cold Fusion have a deployment priority of one, the other Reader bug has a priority of two, while all of the other updates released by Adobe this month are listed as deployment priority 3.

Microsoft Patches for April 2026

This month, Microsoft released a monstrous 163 new CVEs in Windows and Windows components, Office and Office Components, Microsoft Edge (Chromium-based), Azure, .NET and Visual Studio, SQL Server, Hyper-V Server, BitLocker, and the Windows Wallet Service. Counting the third-party and a huge Chromium release, it brings the total number of CVEs to a staggering 247 updates. Six of these bugs were reported through the TrendAI ZDI program. Eight of these bugs are rated Critical, two are rated as Moderate, and the rest are rated Important in severity.

By my count, this is the second-largest monthly release in Microsoft’s history. There are many things we could speculate on to justify the size, but if Microsoft is like the other programs out there (including ours), they are likely seeing a rise in submissions found by AI tools. For us, our incoming rate has essentially tripled, making triage a challenge, to say the least. Whatever the reason, we have a lot of bugs to deal with this month. I should also point out that the Pwn2Own Berlin occurs next month, and it’s typical for vendors to patch as much as they can before the event.

There is one Microsoft bug listed as under active attack at the time of release, and one other that’s publicly known. Let’s take a closer look at some of the more interesting updates for this month, starting with the vulnerability being exploited in the wild:

-    CVE-2026-32201 - Microsoft SharePoint Server Spoofing Vulnerability
Microsoft doesn’t provide a lot of information about this bug, but Spoofing bugs in SharePoint often manifest as cross-site scripting (XSS) bugs. They do note that attackers could view information or make changes to disclosed information. As always, they don’t provide any information on how widespread these attacks are, but I wouldn’t wait to test and deploy this fix – especially if you have internet-connected SharePoint servers.

-    CVE-2026-33825 - Microsoft Defender Elevation of Privilege Vulnerability
This bug is listed as publicly known, and this time, we know exactly where it was disclosed. There have been some questions about how exploitable this bug may be, but it does look like it’s a real problem – just with some reliability issues in its current state. I won’t add on to the commentary from the researcher about working with Microsoft. I’m just glad they are offering a fix for the vulnerability. If you rely on Defender, test and deploy this one quickly.

-   CVE-2026-33827 - Windows TCP/IP Remote Code Execution Vulnerability
This vulnerability allows remote, unauthenticated attackers to exploit code on affected systems without user interaction. That adds up to a wormable bug – at least on systems with IPv6 and IPSec enabled. It is a race condition, which sets exploitability to High on the CVSS scale, but we see race conditions exploited at Pwn2Own all the time, so don’t rely on that obstacle. If you’re running IPv6, I would test and deploy this fix quickly before public exploits become available.

-    CVE-2026-33824 - Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability
Speaking of wormable bugs, here’s our second one this month. By the title, we can tell that systems with IKE enabled are affected, but that leaves plenty of targets for attackers. Microsoft also notes a significant mitigation for this bug. Blocking UDP ports 500 and 4500 at the perimeter prevents external attackers from reaching the affected service. However, insiders could still target this for lateral movement within an enterprise. For enterprises using IKE, get this fix tested and deployed with haste.

Here’s the full list of CVEs released by Microsoft for April 2026:

April 2026 Patch Tuesday CVE Title Severity CVSS Public Exploited Type CVE-2026-32201 Microsoft SharePoint Server Spoofing Vulnerability Important 6.5 No Yes Spoofing CVE-2026-5281 * Chromium: CVE-2026-5281 Use after free in Dawn High N/A No Yes RCE CVE-2026-33825 Microsoft Defender Elevation of Privilege Vulnerability Important 7.8 Yes No EoP CVE-2026-23666 .NET Framework Denial of Service Vulnerability Critical 7.5 No No DoS CVE-2026-32190 Microsoft Office Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-33114 Microsoft Word Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-33115 Microsoft Word Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-32157 Remote Desktop Client Remote Code Execution Vulnerability Critical 8.8 No No RCE CVE-2026-33826 Windows Active Directory Remote Code Execution Vulnerability Critical 8 No No RCE CVE-2026-33824 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability Critical 9.8 No No RCE CVE-2026-33827 Windows TCP/IP Remote Code Execution Vulnerability Critical 8.1 No No RCE CVE-2026-26171 .NET Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-32226 .NET Framework Denial of Service Vulnerability Important 5.9 No No DoS CVE-2026-32178 .NET Spoofing Vulnerability Important 7.5 No No Spoofing CVE-2026-32203 .NET and Visual Studio Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-33116 .NET, .NET Framework, and Visual Studio Denial of Service Vulnerability Important 7.5 No No DoS CVE-2023-20585 * AMD: CVE-2023-20585 IOMMU Write Buffer Vulnerability Important 5.3 No No RCE CVE-2026-32072 Active Directory Spoofing Vulnerability Important 6.2 No No Spoofing CVE-2026-25184 Applocker Filter Driver (applockerfltr.sys) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32171 Azure Logic Apps Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-32168 Azure Monitor Agent Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32192 Azure Monitor Agent Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32181 Connected User Experiences and Telemetry Service Denial of Service Vulnerability Important 5.5 No No DoS CVE-2026-27924 Desktop Window Manager Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32152 Desktop Window Manager Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32154 Desktop Window Manager Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-27923 Desktop Window Manager Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32155 Desktop Window Manager Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-23653 GitHub Copilot and Visual Studio Code Information Disclosure Vulnerability Important 5.7 No No Info CVE-2026-23653 * GitHub: CVE-2026-32631 'git clone' from manipulated repositories can leak NTLM hashes Important 7.4 No No Info CVE-2026-33096 HTTP.sys Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-25250 * MITRE: CVE-2026-25250 Secure Boot disable Eazy Fix Important 6 No No SFB CVE-2026-26181 Microsoft Brokering File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32219 Microsoft Brokering File System Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32091 Microsoft Brokering File System Elevation of Privilege Vulnerability Important 8.4 No No EoP CVE-2026-26152 Microsoft Cryptographic Services Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-33103 Microsoft Dynamics 365 (On-Premises) Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-32188 Microsoft Excel Information Disclosure Vulnerability Important 7.1 No No Info CVE-2026-32189 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-32197 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-32198 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-32199 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-32184 Microsoft High Performance Compute (HPC) Pack Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26155 Microsoft Local Security Authority Subsystem Service Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-27914 Microsoft Management Console Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26149 Microsoft Power Apps Security Feature Bypass Important 9 No No SFB CVE-2026-32200 Microsoft PowerPoint Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-26143 Microsoft PowerShell Security Feature Bypass Vulnerability Important 7.8 No No SFB CVE-2026-33120 † Microsoft SQL Server Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-20945 Microsoft SharePoint Server Spoofing Vulnerability Important 4.6 No No Spoofing CVE-2026-33822 Microsoft Word Information Disclosure Vulnerability Important 6.1 No No Info CVE-2026-33095 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-23657 Microsoft Word Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-32081 Package Catalog Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-26170 PowerShell Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26183 Remote Access Management service/API (RPC server) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26160 Remote Desktop Licensing Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26159 Remote Desktop Licensing Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26151 Remote Desktop Spoofing Vulnerability Important 7.1 No No Spoofing CVE-2026-32085 Remote Procedure Call Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-32167 SQL Server Elevation of Privilege Vulnerability Important 6.7 No No EoP CVE-2026-32176 SQL Server Elevation of Privilege Vulnerability Important 6.7 No No EoP CVE-2026-0390 UEFI Secure Boot Security Feature Bypass Vulnerability Important 6.7 No No SFB CVE-2026-32220 UEFI Secure Boot Security Feature Bypass Vulnerability Important 4.4 No No SFB CVE-2026-32212 Universal Plug and Play (upnp.dll) Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-32214 Universal Plug and Play (upnp.dll) Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-32079 Web Account Manager Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-33104 Win32k Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32196 Windows Admin Center Spoofing Vulnerability Important 6.1 No No Spoofing CVE-2026-26178 Windows Advanced Rasterization Platform Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-32073 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-26168 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26173 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-26177 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-26182 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-27922 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-33099 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-33100 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32088 Windows Biometric Service Security Feature Bypass Vulnerability Important 6.1 No No SFB CVE-2026-27913 Windows BitLocker Security Feature Bypass Vulnerability Important 7.7 No No SFB CVE-2026-26175 Windows Boot Manager Security Feature Bypass Vulnerability Important 4.6 No No SFB CVE-2026-32162 Windows COM Elevation of Privilege Vulnerability Important 8.4 No No EoP CVE-2026-20806 Windows COM Server Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-26176 Windows Client Side Caching driver (csc.sys) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-27926 Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32070 Windows Common Log File System Driver Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-33098 Windows Container Isolation FS Filter Driver Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26153 Windows Encrypted File System (EFS) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32087 Windows Function Discovery Service (fdwsd.dll) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32093 Windows Function Discovery Service (fdwsd.dll) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32086 Windows Function Discovery Service (fdwsd.dll) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32150 Windows Function Discovery Service (fdwsd.dll) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-27931 Windows GDI Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-27930 Windows GDI Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-32221 Windows Graphics Component Remote Code Execution Vulnerability Important 8.4 No No RCE CVE-2026-27906 Windows Hello Security Feature Bypass Vulnerability Important 4.4 No No SFB CVE-2026-27928 Windows Hello Security Feature Bypass Vulnerability Important 8.7 No No SFB CVE-2026-26156 Windows Hyper-V Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-32149 Windows Hyper-V Remote Code Execution Vulnerability Important 7.3 No No RCE CVE-2026-27910 Windows Installer Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-27912 Windows Kerberos Elevation of Privilege Vulnerability Important 8 No No EoP CVE-2026-26179 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26180 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32195 Windows Kernel Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-26163 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32215 Windows Kernel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-32217 Windows Kernel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-32218 Windows Kernel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-26169 Windows Kernel Memory Information Disclosure Vulnerability Important 6.1 No No Info CVE-2026-27929 Windows LUA File Virtualization Filter Driver Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32071 Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-20930 Windows Management Services Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26162 Windows OLE Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-33101 Windows Print Spooler Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32084 Windows Print Spooler Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-27927 Windows Projected File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26184 Windows Projected File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32069 Windows Projected File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32074 Windows Projected File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32078 Windows Projected File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26167 Windows Push Notifications Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-32158 Windows Push Notifications Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32159 Windows Push Notifications Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32160 Windows Push Notifications Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26172 Windows Push Notifications Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-20928 Windows Recovery Environment Security Feature Bypass Vulnerability Important 4.6 No No SFB CVE-2026-32216 Windows Redirected Drive Buffering System Denial of Service Vulnerability Important 5.5 No No DoS CVE-2026-27909 Windows Search Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26161 Windows Sensor Data Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26174 Windows Server Update Service (WSUS) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32224 Windows Server Update Service (WSUS) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-26154 Windows Server Update Service (WSUS) Tampering Vulnerability Important 7.5 No No Tampering CVE-2026-26165 Windows Shell Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-26166 Windows Shell Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-27918 Windows Shell Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32151 Windows Shell Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-32225 Windows Shell Security Feature Bypass Vulnerability Important 8.8 No No SFB CVE-2026-32202 Windows Shell Spoofing Vulnerability Important 4.3 No No Spoofing CVE-2026-32082 Windows Simple Search and Discovery Protocol (SSDP) Service Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32083 Windows Simple Search and Discovery Protocol (SSDP) Service Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32068 Windows Simple Search and Discovery Protocol (SSDP) Service Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32183 Windows Snipping Tool Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-32089 Windows Speech Brokered Api Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32090 Windows Speech Brokered Api Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32153 Windows Speech Runtime Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-27907 Windows Storage Spaces Controller Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32076 Windows Storage Spaces Controller Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-27908 Windows TDI Translation Driver (tdx.sys) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-27921 Windows TDI Translation Driver (tdx.sys) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-27915 Windows UPnP Device Host Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-27919 Windows UPnP Device Host Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32075 Windows UPnP Device Host Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-27916 Windows UPnP Device Host Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-27920 Windows UPnP Device Host Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32077 Windows UPnP Device Host Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-27925 Windows UPnP Device Host Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-32156 Windows UPnP Device Host Remote Code Execution Vulnerability Important 7.4 No No RCE CVE-2026-32223 Windows USB Printing Stack (usbprint.sys) Elevation of Privilege Vulnerability Important 6.8 No No EoP CVE-2026-32165 Windows User Interface Core Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-27911 Windows User Interface Core Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32163 Windows User Interface Core Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-32164 Windows User Interface Core Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-23670 Windows Virtualization-Based Security (VBS) Security Feature Bypass Vulnerability Important 5.7 No No SFB CVE-2026-27917 Windows WFP NDIS Lightweight Filter Driver (wfplwfs.sys) Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32080 Windows WalletService Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-32222 Windows Win32k Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-21637 * HackerOne: CVE-2026-21637 TLS PSK/ALPN Callback Exceptions Bypass Error Handlers Moderate 7.5 No No SFB CVE-2026-33119 Microsoft Edge (Chromium-based) for Android Spoofing Vulnerability Moderate 5.4 No No Spoofing CVE-2026-33829 Windows Snipping Tool Spoofing Vulnerability Moderate 4.3 No No Spoofing CVE-2026-5858 * Chromium: CVE-2026-5858 Heap buffer overflow in WebML Critical N/A No No RCE CVE-2026-5859 * Chromium: CVE-2026-5859 Integer overflow in WebML Critical N/A No No RCE CVE-2026-5272 * Chromium: CVE-2026-5272 Heap buffer overflow in GPU High N/A No No RCE CVE-2026-5273 * Chromium: CVE-2026-5273 Use after free in CSS High N/A No No RCE CVE-2026-5274 * Chromium: CVE-2026-5274 Integer overflow in Codecs High N/A No No RCE CVE-2026-5275 * Chromium: CVE-2026-5275 Heap buffer overflow in ANGLE High N/A No No RCE CVE-2026-5276 * Chromium: CVE-2026-5276 Insufficient policy enforcement in WebUSB High N/A No No SFB CVE-2026-5277 * Chromium: CVE-2026-5277 Integer overflow in ANGLE High N/A No No RCE CVE-2026-5279 * Chromium: CVE-2026-5279 Object corruption in V8 High N/A No No RCE CVE-2026-5280 * Chromium: CVE-2026-5280 Use after free in WebCodecs High N/A No No RCE CVE-2026-5283 * Chromium: CVE-2026-5283 Inappropriate implementation in ANGLE High N/A No No SFB CVE-2026-5284 * Chromium: CVE-2026-5284 Use after free in Dawn High N/A No No RCE CVE-2026-5285 * Chromium: CVE-2026-5285 Use after free in WebGL High N/A No No RCE CVE-2026-5286 * Chromium: CVE-2026-5286 Use after free in Dawn High N/A No No RCE CVE-2026-5287 * Chromium: CVE-2026-5287 Use after free in PDF High N/A No No RCE CVE-2026-5289 * Chromium: CVE-2026-5289 Use after free in Navigation High N/A No No RCE CVE-2026-5290 * Chromium: CVE-2026-5290 Use after free in Compositing High N/A No No RCE CVE-2026-5860 * Chromium: CVE-2026-5860 Use after free in WebRTC High N/A No No RCE CVE-2026-5861 * Chromium: CVE-2026-5861 Use after free in V8 High N/A No No RCE CVE-2026-5862 * Chromium: CVE-2026-5862 Inappropriate implementation in V8 High N/A No No SFB CVE-2026-5863 * Chromium: CVE-2026-5863 Inappropriate implementation in V8 High N/A No No SFB CVE-2026-5864 * Chromium: CVE-2026-5864 Heap buffer overflow in WebAudio High N/A No No RCE CVE-2026-5865 * Chromium: CVE-2026-5865 Type Confusion in V8 High N/A No No RCE CVE-2026-5866 * Chromium: CVE-2026-5866 Use after free in Media High N/A No No RCE CVE-2026-5867 * Chromium: CVE-2026-5867 Heap buffer overflow in WebML High N/A No No RCE CVE-2026-5868 * Chromium: CVE-2026-5868 Heap buffer overflow in ANGLE High N/A No No RCE CVE-2026-5869 * Chromium: CVE-2026-5869 Heap buffer overflow in WebML High N/A No No RCE CVE-2026-5870 * Chromium: CVE-2026-5870 Integer overflow in Skia High N/A No No RCE CVE-2026-5871 * Chromium: CVE-2026-5871 Type Confusion in V8 High N/A No No RCE CVE-2026-5872 * Chromium: CVE-2026-5872 Use after free in Blink High N/A No No RCE CVE-2026-5873 * Chromium: CVE-2026-5873 Out of bounds read and write in V8 High N/A No No RCE CVE-2026-5291 * Chromium: CVE-2026-5291 Inappropriate implementation in WebGL Medium N/A No No SFB CVE-2026-5292 * Chromium: CVE-2026-5292 Out of bounds read in WebCodecs Medium N/A No No Info CVE-2026-5874 * Chromium: CVE-2026-5874 Use after free in PrivateAI Medium N/A No No RCE CVE-2026-5875 * Chromium: CVE-2026-5875 Policy bypass in Blink Medium N/A No No SFB CVE-2026-5876 * Chromium: CVE-2026-5876 Side-channel information leakage in Navigation Medium N/A No No Info CVE-2026-5877 * Chromium: CVE-2026-5877 Use after free in Navigation Medium N/A No No RCE CVE-2026-5878 * Chromium: CVE-2026-5878 Incorrect security UI in Blink Medium N/A No No Spoofing CVE-2026-5879 * Chromium: CVE-2026-5879 Insufficient validation of untrusted input in ANGLE Medium N/A No No SFB CVE-2026-5880 * Chromium: CVE-2026-5880 Incorrect security UI in browser UI Medium N/A No No Spoofing CVE-2026-5881 * Chromium: CVE-2026-5881 Policy bypass in LocalNetworkAccess Medium N/A No No SFB CVE-2026-5882 * Chromium: CVE-2026-5882 Incorrect security UI in Fullscreen Medium N/A No No Spoofing CVE-2026-5883 * Chromium: CVE-2026-5883 Use after free in Media Medium N/A No No RCE CVE-2026-5884 * Chromium: CVE-2026-5884 Insufficient validation of untrusted input in Media Medium N/A No No SFB CVE-2026-5885 * Chromium: CVE-2026-5885 Insufficient validation of untrusted input in WebML Medium N/A No No SFB CVE-2026-5886 * Chromium: CVE-2026-5886 Out of bounds read in WebAudio Medium N/A No No Info CVE-2026-5887 * Chromium: CVE-2026-5887 Insufficient validation of untrusted input in Downloads Medium N/A No No SFB CVE-2026-5888 * Chromium: CVE-2026-5888 Uninitialized Use in WebCodecs Medium N/A No No RCE CVE-2026-5889 * Chromium: CVE-2026-5889 Cryptographic Flaw in PDFium Medium N/A No No SFB CVE-2026-5890 * Chromium: CVE-2026-5890 Race in WebCodecs Medium N/A No No RCE CVE-2026-5891 * Chromium: CVE-2026-5891 Insufficient policy enforcement in browser UI Medium N/A No No SFB CVE-2026-5892 * Chromium: CVE-2026-5892 Insufficient policy enforcement in PWAs Medium N/A No No SFB CVE-2026-5893 * Chromium: CVE-2026-5893 Race in V8 Medium N/A No No RCE CVE-2026-5894 * Chromium: CVE-2026-5894 Inappropriate implementation in PDF Low N/A No No SFB CVE-2026-5895 * Chromium: CVE-2026-5895 Incorrect security UI in Omnibox Low N/A No No Spoofing CVE-2026-5896 * Chromium: CVE-2026-5896 Policy bypass in Audio Low N/A No No SFB CVE-2026-5897 * Chromium: CVE-2026-5897 Incorrect security UI in Downloads Low N/A No No Spoofing CVE-2026-5898 * Chromium: CVE-2026-5898 Incorrect security UI in Omnibox Low N/A No No Spoofing CVE-2026-5899 * Chromium: CVE-2026-5899 Incorrect security UI in History Navigation Low N/A No No Spoofing CVE-2026-5900 * Chromium: CVE-2026-5900 Policy bypass in Downloads Low N/A No No SFB CVE-2026-5901 * Chromium: CVE-2026-5901 Policy bypass in DevTools Low N/A No No SFB CVE-2026-5902 * Chromium: CVE-2026-5902 Race in Media Low N/A No No RCE CVE-2026-5903 * Chromium: CVE-2026-5903 Policy bypass in IFrameSandbox Low N/A No No SFB CVE-2026-5904 * Chromium: CVE-2026-5904 Use after free in V8 Low N/A No No RCE CVE-2026-5905 * Chromium: CVE-2026-5905 Incorrect security UI in Permissions Low N/A No No Spoofing CVE-2026-5906 * Chromium: CVE-2026-5906 Incorrect security UI in Omnibox Low N/A No No Spoofing CVE-2026-5907 * Chromium: CVE-2026-5907 Insufficient data validation in Media Low N/A No No SFB CVE-2026-5908 * Chromium: CVE-2026-5908 Integer overflow in Media Low N/A No No RCE CVE-2026-5909 * Chromium: CVE-2026-5909 Integer overflow in Media Low N/A No No RCE CVE-2026-5910 * Chromium: CVE-2026-5910 Integer overflow in Media Low N/A No No RCE CVE-2026-5911 * Chromium: CVE-2026-5911 Policy bypass in ServiceWorkers Low N/A No No SFB CVE-2026-5912 * Chromium: CVE-2026-5912 Integer overflow in WebRTC Low N/A No No RCE CVE-2026-5913 * Chromium: CVE-2026-5913 Out of bounds read in Blink Low N/A No No Info CVE-2026-5914 * Chromium: CVE-2026-5914 Type Confusion in CSS Low N/A No No RCE CVE-2026-5915 * Chromium: CVE-2026-5915 Insufficient validation of untrusted input in WebML Low N/A No No SFB CVE-2026-5918 * Chromium: CVE-2026-5918 Inappropriate implementation in Navigation Low N/A No No SFB CVE-2026-5919 * Chromium: CVE-2026-5919 Insufficient validation of untrusted input in WebSockets Low N/A No No SFB CVE-2026-33118 Microsoft Edge (Chromium-based) Spoofing Vulnerability Low 4.3 No No Spoofing

* Indicates this CVE had been released by a third party and is now being included in Microsoft releases.

† Indicates further administrative actions are required to fully address the vulnerability.

 

Looking at the other Critical-rated bugs in this month’s release, there are three Office-related bugs where the Preview Pane is once again listed as an exploit vector. I would still like to have a full-proof way of disabling the Preview Pane, but I don’t see that as an option. There’s a bug in the RDP client, but that involves connecting to a malicious RDP server. The bug in Active Directory requires authentication and a network adjacent attacker. The final Critical-rated bug is an interesting DoS in .NET Framework. An unauthenticated attacker could deny service over a network – presumably crippling any affected app made in .NET. You rarely see Critical-rated DoS bugs, but this one deserves the moniker.

Moving on to the other code execution bugs, you have quite a few open-and-own bugs in Office components, most notably Excel, where the Preview Pane is not an attack vector. The bug in SQL Server requires authentication, and as usual, additional steps are needed to ensure you have the correct update to remediate this vulnerability. The two bugs in Hyper-V almost reads like a privilege escalation since it allows unauthorized attackers to execute code locally. That’s the same for the bugs in the Windows Snipping Tool and the UPnP Device host.

More than half of this release addresses Elevation of Privilege (EoP) bugs. However, most simply lead to local attackers executing their code at SYSTEM-level privileges or administrative privileges, so there’s not much to add without further technical details about the bugs themselves. The bugs in SQL Server could allow an attacker to gain SQL sysadmin privileges. One of the kernel bugs simply states an attacker could “elevate privileges locally”. How obtuse. That’s similar for the bug in afd.sys and Desktop Windows Manager, but Microsoft also states that these bugs could crash an affected system. There are several bugs that result in a sandbox escape, including Windows Push Notifications, AFD for Winsock, Management Services, and User Interface Core. Of these, CVE-2026-26167 (Push Notifications) is the most notable — it's the only one with low attack complexity, meaning no race condition needed. The rest all require winning a race condition (AC:H). The bugs in UPnP are interesting as they allow attackers to gain access to a limited set of administrator-protected objects. Not a full escalation but definitely getting access to resources they shouldn’t. The vulnerability in the Brokering File System allows attackers to gain the level of the logged on user, so don’t do your normal activities as a user with admin privileges. The bug in Azure Monitor Agent leads to root-level access.

There are a dozen different security features bypass bugs in the April release. Some of these are obvious by the title alone. For example, the bugs in Windows Hello bypass safety features within the Hello app itself. The bug in the Biometric Service allows attackers to bypass biometric protections. The vulns in BitLocker and Secure Boot bypass protections in those components. The bug in Power Apps allows attackers to bypass a security warning dialog and trick targets into triggering an external protocol call that performs unintended actions on the user’s device. The bug in Windows Shell allows attackers to bypass Mark of the Web (MotW) protections. The bug in PowerShell could almost be described as a code execution bug as exploiting it bypasses dynamic-expression security checks, which could result in code execution. The vulnerability in the Windows Recovery Environment allows local attackers to bypass BitLocker device encryption. Finally, the bug in Virtualization‑Based Security (VBS) is the most interesting of the bunch – and not just because VBS is a (relatively) new feature. The problem allows attackers to manipulate allow a compromised Windows kernel to modify memory belonging to the secure kernel, breaking the intended isolation guarantees provided by VBS. Somewhat of a sandbox escape, but this time, you’re escaping from Virtual Trust Level 0 (VTL0) to Virtual Trust Level 1 (VTL1). Neat.

Moving on to the Information Disclosure bugs fixed this month, we have 20 different CVEs. Fortunately, most of these simply result in info leaks consisting of unspecified memory contents or memory addresses. While useful in crafting exploits, they aren’t exactly exciting on their own. There are also several bugs that disclose addresses from an object a contained in a sandboxed execution environment. This includes bugs in the Print Spooler, Package Catalog, and Web Account Manager. The bug in Dynamics 365 discloses the ever ineffable “sensitive information”. There are three different info disclosure bugs in UPnP. Two allow an attacker to read from the file system, while the third discloses anything available to the LOCAL SERVICE account. The final info disclosure bug resides in Copilot and Visual Studio and allows attackers to disclose the contents of the Model Context Protocol (MCP) when using Copilot. There are those who think MCP is dead (thanks to agentic AI agents), but if you’re using a custom MCP, I doubt you would want it leaked.

The April release contains just a handful of Spoofing bugs. Some, like the bugs in .NET, Active Directory, and Windows Shell, just say that they allow spoofing over a network. Others, like the bug in Windows Snipping Tool, say similar but also note that it could be used to relay NTLMv2 hashes. The patch for RDP notes that there are new warning dialogs coming this month. The bug in the Windows Admin Center would allow an attacker to interact with other tenant’s applications and content. Finally, the spoofing bug in SharePoint is another XSS issue.

There are eight DoS bugs in the April release, but as always, Microsoft provides no actionable information about the vulnerabilities. Microsoft does offer a mitigation for the http.sys bug that can be applied while you test and deploy the patch, but I would rely on the patch rather than the mitigation. Another exception is the bug for Connected User Experiences and Telemetry Service, which allows attackers to deny service locally rather than over the network.

The final(!) bug in the April release is a Tampering bug in WSUS that reads like a DoS. According to Microsoft, “An attacker can send specially crafted packets which could affect availability of the service and result in Denial of Service (DoS).” But sure – let’s call it Tampering.

No new advisories are being released this month.

Looking Ahead

I will be in Berlin for the next Patch Tuesday, which will be May 12, and I’ll provide my full thoughts then on what will hopefully be a smaller release than this one. Until then, stay safe, happy patching, and may all your reboots be smooth and clean!

In September of 2024, ZDI received a vulnerability submission from an anonymous researcher affecting npm CLI that revealed a fundamental design issue in Node.js. This blog details how it continues to expose applications to local privilege escalation (LPE) attacks on Windows systems, including the Discord desktop app (CVE-2026-0776 0-Day), which remains unpatched and vulnerable.

The issue is straightforward: when Node.js resolves modules, the runtime searches for packages in C:\node_modules as part of its default behavior. Since low-privileged Windows users can create this directory and plant malicious modules there, any Node.js application with missing or optional dependencies becomes vulnerable to privilege escalation.

This issue is not new. Concerned discussions about Node.js's module search path behavior date back to 2013 and 2014.

Node.js has explicitly stated that they consider this behavior intentional:

"Node.js trusts the file system."

They do not treat CWE-427 (Uncontrolled Search Path Element) as a vulnerability, pushing responsibility onto application developers.

Figure 1: The vendor’s security policy stance on CWE-427 as a non-issue

As the case studies below demonstrate, this stance has dangerous consequences. Developers are largely unaware of this attack surface, and the result is a proliferation of exploitable applications. We will show examples in npm CLI and Discord, but there are likely many more applications that are impacted by this.

Root Cause

The root cause lies in the way Node.js performs module resolution. This is documented here. Although UNIX paths are used in the documentation provided by Node.js, the same logic is applied on Windows.

When a Node.js application calls require(‘bar’), the runtime searches for the module in the following order:

1. C:\Users\Administrator\projects\node_modules\bar.js
2. C:\Users\Administrator\node_modules\bar.js
3. C:\Users\node_modules\bar.js
4. C:\node_modules\bar.js <-- The problem

If the legitimate package is missing, whether due to optional dependencies, development packages removed in production, or installation failures, the resolution search will eventually reach the root of the drive. Any user can create C:\node_modules and place a malicious package there. Once the low-privileged user has populated C:\node_modules\bar.js, Node.js will load and execute it in the context of the current user. In the following case studies, we will provide evidence of how, despite properly following NPM’s guidelines, third-party dependencies end up triggering this vulnerability anytime you launch the application.

Case Studies: Real-World Manifestations

The Optional Dependency Pattern: npm supports optional dependencies to be specified in the project’s package.json file. The recommended pattern for checking for these dependencies is as follows:

Figure 2: npm Docs showing optionalDependencies example code

This pattern silently catches errors when optional packages are missing, allowing execution to continue. So what’s the problem? On Windows, Node.js will search all the way up to C:\node_modules where an attacker may have planted a malicious replacement. This search behavior mirrors UNIX conventions where /node_modules at the filesystem root is typically only writable by root. Windows systems by default allow any user to create C:\node_modules. Once require is called, Node.js will traverse the search path and execute any matching module it finds.

Important things to note:

1. This pattern can be found in third party libraries deep in a dependency tree, as we will see in the following examples.
2. There is no runtime indication to either the developers or the end users that such a vulnerability exists without looking at the filesystem logs with Procmon.
3. The optional dependency pattern itself would not be dangerous if Node.js did not search for packages in C:\node_modules.

Let’s take a deeper look at both cases and see why this is so dangerous.

Case 1: npm CLI (ZDI-26-043 / ZDI-CAN-25430 / CVE-2026-0775).

Prior to version 11.2.0, npm CLI used a library called “promise-inflight”, which contained an optional dependency on a package called “bluebird”.

Figure 3: npm CLI repo snippet showing require call for missing bluebird package dependency

When Node.js is installed on the system, npm is included by default without the bluebird package. This vulnerability was introduced when bluebird was removed through a well-intentioned pull request (https://github.com/npm/cli/pull/1438/changes), demonstrating how easy it is for developers to unknowingly create this attack surface.

We can see Node’s package resolution logic at work in the screenshot below:

Figure 4: Procmon log showing the package resolution behavior of Node.js via CVE-2026-0775

First, the application looks for the bluebird.js package in the Node.js installation directory. Node.js sequentially searches back to the system root until it finds the package. If an attacker has placed C:\node_modules\bluebird.js, the require call will find, read, and execute the malicious payload in the context of any user running npm on the system.

This vulnerability is especially dangerous because it is triggered when many npm * cli commands are used. Common development commands such as npm install, npm –l, and npm prune will all execute the malicious bluebird.jspackage.

Case 2: Discord (ZDI-26-040/ ZDI-CAN-27057 / CVE-2026-0776/ UNPATCHED)

On April 22, 2025, ZDI received a report for a similar vulnerability in Discord reported by T. Doğa Gelişli. Discord uses the ws WebSocket library, which contains an optional dependency on utf-8-validate for compatibility with older Node.js versions:

Figure 5: websockets library repo snippet showing require call for missing utf-8-validate package dependency

Discord does not ship with the utf-8-validate package. As a result, the following Procmon logs show the same behavior as Case 1. Anytime Discord is launched, the attacker controlled C:\node_modules\utf-8-validate.js is executed.

Figure 6: Procmon log showing the package resolution behavior of Node.js via CVE-2026-0776

The ws library does support disabling this check via the WS_NO_UTF_8_VALIDATE environment variable, but this requires the consuming application (Discord) to set it explicitly. Here’s a quick video demonstrating the bug by popping the calc app when opening Discord:

Discord automatically opens on login by default, so in practice code execution happens immediately without any user interaction. Strangely, the Discord Security team made it clear to us in their responses that they do not consider local attack vectors as valid security issues.

The Bigger Picture

The cases above represent only a few of the applications affected by this pattern. During our investigation we found many other independent reports.  These issues in Mongo DB Compass and Mongo DB Shell are just two other examples.

Every Windows application built on Node.js with missing or optional dependencies is potentially vulnerable. This includes desktop applications that utilize Electron as well as popular web frameworks such as Next.js and React.

Each vendor has clearly stated that they will not treat these issues as vulnerabilities:

NPM’s response to our report:

“exploits that require local access to a machine are considered ineligible for npm CLI

Discord’s response to our report:

“We do not consider physical/local attacks as valid security issues”

Node.js, in the “Examples of non-vulnerabilities” section of their Security Policy:

“Node.js trusts the file system in the environment accessible to it. Therefore, it is not a vulnerability if it accesses/loads files from any path that is accessible to it.”

Conclusion

The vulnerability pattern described in this blog stems from a deliberate design decision by Node.js maintainers. While Node.js's position that “applications should trust their filesystem” may hold true on properly administered UNIX systems, it creates a systemic vulnerability on Windows where low-privileged users can write to C:\node_modules. Without a fix from Node.js, the burden silently falls on application developers.

Making matters worse, the vulnerable code may not live in the application code itself. The optional dependencies that trigger this behavior could come from third-party libraries buried in the dependency tree as we saw with both Discord and npm CLI.

We encourage security researchers to further review this issue and investigate other applications for this dangerous behavior. You can find us online at @bobbygould5 and @izobashi, and follow the team on Twitter, Mastodon, LinkedIn, or Bluesky for the latest in exploit techniques and security patches.

 

DISCLOSURE TIMELINES

 

NPM CLI:

2024-11-13 – ZDI submitted the report to the vendor

2024-11-13 – The vendor acknowledged the receipt of the report

2024-11-13 – The vendor communicated that the reported behavior was by design and they do not consider local attacks as valid security issues

2025-08-05 – ZDI encouraged the vendor to re-assess the issue

2025-12-18 – ZDI notified the vendor of the intention to publish the case as a 0-day advisory

 

DISCORD:

2025-07-08 – ZDI notified vendor

2025-09-11 – ZDI followed up with vendor

2025-09-15 – Vendor stated they do not consider local attacks as valid security issues

2025-12-01 – ZDI explained why we believe the issue is still valid

2025-12-10 – Vendor replied that the vulnerability is still out of scope 

2025-12-11 – ZDI informed vendor of intent to publish 0-day 

  

REFERENCES

https://nodejs.org/api/modules.html#loading-from-node_modules-folders

https://docs.npmjs.com/cli/v10/configuring-npm/package-json#optionaldependencies

https://groups.google.com/g/nodejs/c/5BGr5dliUIk/m/abJEH3sPymcJ?pli=1

https://github.com/nodejs/node-v0.x-archive/issues/8830

https://bounty.github.com/ineligible.html#vulnerability_in_upstream_dependencies:~:text=eligible%20for%20rewards.-,Local%20access,-Vulnerabilities%20which%20require

https://github.com/nodejs/node/security/policy#examples-of-non-vulnerabilities

If you just want to read the contest rules, click here.

 

Willkommen zurück, meine Damen und Herren, zu unserem zweiten Wettbewerb in Berlin! That’s correct (if Google translate didn’t steer me wrong). After our inaugural competition last year, Pwn2Own returns to Berlin and OffensiveCon. Outside of our shipping troubles, we had an amazing time and can’t wait to get back.

Last year, we added Artificial Intelligence as a category with great results. This year, we’re expanding this and splitting it into multiple different categories: AI Databases, Coding Agents, Local Inferences, and a separate category for NVIDIA products. In last year’s contest, NVIDIA targets had wins, losses, and collisions, so it will be interesting to see how they fare this year. The folks from AWS wanted to get into the fray as well, so they stepped up to co-sponsor this year’s event, which allows us to increase the reward for bugs in Firecracker. Of course, we have all of the returning categories as well, including web browsers, containers, servers, virtualization, and operating systems. There’s more than $1,000,000 in cash and prizes available for contestants. Last year, we awarded $1,078,750 for 28 unique 0-days over the three-day event. We’ll see if we can eclipse those numbers in 2026.

The contest begins on May 14, but registration closes on May 7, so don’t delay in getting those submissions in. We’re hoping for maximum participation, so set aside your vibe coding and show us what you can really do. We’re looking forward to some cutting-edge exploitation on display. For 2026, we have a total of 31 targets across 10 categories. Here is a full list of the categories for this year’s event:  

-- Virtualization
-- Web Browser
-- Enterprise Applications
-- Servers
-- Local Escalation of Privilege
-- Containers
-- AI Database
-- Coding Agents
-- Local Inference
-- NVIDIA

Of course, no Pwn2Own competition would be complete without us crowning a Master of Pwn (Meister von Pwn?). Since the order of the contest is decided by a random draw, contestants with an unlucky draw could still demonstrate fantastic research but receive less money since subsequent rounds go down in value. However, the points awarded for each unique, successful entry do not go down. Someone could have a bad draw and still accumulate the most points. The person or team with the most points at the end of the contest will be crowned Master of Pwn, receive 65,000 ZDI reward points (enough for Platinum status), a killer trophy, and a pretty snazzy jacket to boot.

Let's look at the details of the rules for this year's event.

Virtualization Category

Some of the highlights for each contest can be found in the Virtualization Category, and we’re thrilled to see what this year’s event could bring with it. As usual, VMware is the main highlight of this category as we’ll have VMware ESXi return with an award of $150,000. Last year produced the first ESXi exploits in Pwn2Own history, so it will be interesting to see if we get more. Microsoft also returns as a target and leads the virtualization category with a $250,000 award for a successful Hyper-V Client guest-to-host escalation. Kernel-based Virtual Machine (KVM) is our final target in this category with a prize of $50,000.

There’s an add-on bonus in this category as well. If a contestant can escape the guest OS, then gain arbitrary code execution on the virtualization target and obtain arbitrary code execution in the guest operating system on a separate virtual machine managed by the same targeted virtualization target, they’ll earn another $50,000. That could push the payout on a ESXi bug to $200,000. This bonus is for KVM and ESXi only. Here’s a detailed look at the targets and available payouts in the Virtualization category:

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Web Browser Category

While browsers are the “traditional” Pwn2Own target, we’re continuously tweaking the targets in this category to ensure they remain relevant. We re-introduced renderer-only exploits a couple of years ago, and this year, we’ve increased the award to $75,000. In fact, we’ve increased the awards across the board for this category. Here’s a detailed look at the targets and available payouts:

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Enterprise Applications Category

Enterprise applications return as targets with Adobe Reader and various Office components on the target list once again. Attempts in this category must be launched from the target under test. For example, launching the target under test from the command line is not allowed. Prizes in this category run from $50,000 for a Reader exploit with a sandbox escape or a Reader exploit with a kernel privilege escalation, and $150,000 for an Office 365 application. Word, Excel, and PowerPoint are all valid targets. Microsoft Office-based targets will have Protected View enabled where applicable. Adobe Reader will have Protected Mode enabled where applicable.

This year, we’re adding a bonus for Copilot data exfiltration and Copilot action execution. Microsoft just patched a bug like this in Excel, so we know they are out there. If you’re able to exploit Copilot in addition to a Microsoft application, you’ll earn an additional $50,000. There are quite a few rules and scenarios around this add-on, so be sure to read the rules carefully and contact us with questions. Here’s a detailed view of the targets and payouts in the Enterprise Application category:

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The Server Category

The Server Category for 2026 focuses solely on the server components we’re most interested in. These servers are often targeted by everyone from ransomware crews to nation/state actors, so we know there are exploits out there for them. The only question is whether we’ll see any of the competitors bring one of those exploits to Pwn2Own. Last year, the bugs demonstrated in SharePoint ended up being exploited in the wild, so we know people are looking for these with great interest. Microsoft Exchange has been a popular target for some time, and it returns as a target this year as well, with a payout of $200,000. This category is rounded out by Microsoft Windows RDP/RDS, which also has a payout of $200,000. Here’s a detailed look at the targets and payouts in the Server category:

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Local Escalation of Privilege Category

This category is a classic for Pwn2Own and focuses on attacks that originate from a standard user and result in executing code as a high-privileged user. A successful entry in this category must leverage a kernel vulnerability to escalate privileges. Red Hat Enterprise Linux for Workstations returns as our Linux-based target, while Apple macOS, and Microsoft Windows 11 return as targets in this category. Prior exploits in this category have won Pwnie awards, so they’re always interesting to see. Here’s a detailed look at the targets and payouts in this category:

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The Container Category

We’re excited to have this category return for its third season, and we’re hopeful that even more contestants will target one of these container targets. For an attempt to be ruled a success against these three, the exploit must be launched from within the guest container/microVM and execute arbitrary code on the host operating system. Again, with help from AWS, Firecracker returns as a target with a prize of $100,000. Here are the targets and payouts for this category:

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AI Database Category

In the past, AI Hackathons have focused on using AI to develop vulnerabilities or other offensive frameworks. We’re opening up the models and various components themselves for exploitation. The first AI sub-category focuses on databases. An attempt in this category must be launched from the contestant’s laptop. Here’s a look at the targets and awards in the AI Database category:

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The Coding Agent Category

Let’s face it. At some point or another, we’ve probably all vibe coded something. There’s no shame in that, but how secure are the tools we use for vibe coding? Well, let’s take the most popular choices and find out. A successful entry must interact with a contestant-controlled resource (e.g. web page, repository, media file) to exploit a vulnerability within the coding agent. The attack vector of the entry must be a common coding agent use case. There are few things out of scope here as well. UI spoofing or misrepresentation unrelated to permission prompts, model jailbreaks or prompt outputs that do not cross security boundaries, and vulnerabilities that require unsafe or permission-less modes are just a few of the things not allowed. As this is a new category, please read the rules carefully to ensure your entry qualifies. Here’s a look at the targets and awards in the AI Coding Agent category:

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The Local Inference Category

We couldn’t leave local inference and LLMs out of Pwn2Own. These products claim to provide enhanced data privacy, zero-cost inference, lower latency, and fully offline functionality. We’ll see how the security stacks up. An attempt in this category must be launched from the contestant’s laptop within the contest network. Here are the targets and payouts for the Local Inference category:

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The NVIDIA Category

Our last AI sub-category focuses solely on NVIDIA products. For network accessible targets, an attempt must be launched from the contestant's laptop within the contest network. For NV Container Toolkit, the attempt must be launched from within a crafted container image and execute arbitrary code on the host operating system. For Megatron Bridge, entries that leverage vulnerabilities pertaining to pickle deserialization or that leverage a vulnerability when “trust_remote_code=true” are out of scope. Here are the targets and payouts for the NVIDIA category:

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Conclusion

The complete rules for Pwn2Own Berlin 2026 are found here. As always, we highly encourage entrants to read the rules thoroughly if they choose to participate. If you are thinking about participating but have specific configuration or rule-related questions, email us. Questions asked over X (nee Twitter), BlueSky, or other means will not be answered. Registration is required to ensure we have sufficient resources on hand at the event. Please contact ZDI at [email protected] to begin the registration process. Registration for onsite participation closes at 5 p.m. Central European Time on May 7, 2026.

Be sure to stay tuned to this blog and follow us on Twitter, Mastodon, LinkedIn, or Bluesky for the latest information and updates about the contest. We look forward to seeing everyone in Germany, and we hope to see some of the best in the world show what they can do – vibe coded or not.

With special thanks to our Pwn2Own Berlin 2026 partners AWS, for providing their expertise and technology.

© 2026 Trend Micro Incorporated. All rights reserved. PWN2OWN, ZERO DAY INITIATIVE, ZDI, ZERO DAY INITIATIVE, TrendAI, and Trend Micro are trademarks or registered trademarks of Trend Micro Incorporated. All other trademarks and trade names are the property of their respective owners.

I am back in the friendly confines of the Mid-South headquarters of TrendAI ZDI (a.k.a. my home office), and am all set for the third patch Tuesday of 2026. Take a break from your regularly scheduled activities and let’s take a look at the latest security patches from Adobe and Microsoft.If you’d rather watch the full video recap covering the entire release, you can check it out here:

Adobe Patches for March 2026

For March, Adobe released eight bulletins addressing 80 unique CVEs in Adobe Acrobat Reader, Commerce, Illustrator, Substance 3D Painter, Premier Pro, Experience Manager, Substance 3D Stager, and the Adobe DNG Software Development Kit (SDK). Two of these bugs were submitted through the TrendAI ZDI program. If you need to prioritize, the update for Acrobat likely has the most impact, with the patch fixing two Critical-rated and one Important bugs. The fix for Experience Manager is the largest this month with 33 CVEs addressed. However, these are simple cross-site scripting (XSS) bugs, so it’s not too exciting. The fix for Commerce is also quite large with 19 CVEs. Most of these are also XSS bugs, but there’s a few security feature bypass bugs in there, too. Adobe actually gives this patch a deployment priority of 2, but it’s not under active attack at the time of release.

The fix for Illustrator corrects seven bugs, including a few Critical-rated ones. The patch for Substance 3D Painter fixes nine different CVEs, all rated Important. That’s not the case for Substance 3D Stager, which fixes six different Critical bugs that could lead to arbitrary code execution. The patch for the Adobe DNG Software Development Kit (SDK) addresses one Critical and one Important bug. Finally, the update for Premiere Pro correct a single, Critical-rated bug that could lead to arbitrary code execution.

None of the bugs fixed by Adobe this month are listed as publicly known or under active attack at the time of release, and beyond the update for Commerce, all of the other updates released by Adobe this month are listed as deployment priority 3.

Microsoft Patches for March 2026

This month, Microsoft released 84 new CVEs in Windows and Windows components, Office and Office Components, Microsoft Edge (Chromium-based), Azure, SQL Server, Hyper-V Server, and the Windows Resilient File System (ReFS). Counting the third-party and Chromium updates listed in the release, it brings to total number of CVEs to 94. Five of these bugs were reported through the TrendAI ZDI program. Eight of these bugs are rated Critical, and the rest are rated Important in severity.

This volume is relatively typical for a March release, and the lack of bugs under active attack is a nice change from last month. There are two vulnerabilities listed as publicly known at the time of release, but none listed as actively exploited.

Let’s take a closer look at some of the more interesting updates for this month, starting with a bug with an AI slant:

-    CVE-2026-26144 - Microsoft Excel Information Disclosure Vulnerability
This is a fascinating bug and an attack scenario we’re likely to see more often. The vulnerability is a simple cross-site scripting (XSS) bug in Excel, but an attacker could use it to cause the Copilot Agent to exfiltrate data off the target. This essentially makes it a zero-click information disclosure. Although not stated, the disclosure is likely at the level of the logged-on user, so there isn’t a privilege escalation component. Info disclosures rarely get rated Critical, but it makes sense here.

-    CVE-2026-26110/CVE-2026-26113 - Microsoft Office Remote Code Execution Vulnerability
Another month and another pair of Office bugs where the Preview Pane is an exploit vector. I’ve lost count of how many of these bugs have been patched over the last year, but it’s just a matter of time until they start appearing in active exploits. The latest versions of Outlook allow you to hide the Preview Pane, but it isn’t clear if this would mitigate these attacks. The best option is still to test and deploy the update, but considering how many of these patches exist, it’s likely further updates will be needed to fully address these issues.

-    CVE-2026-23669 - Windows Print Spooler Remote Code Execution Vulnerability
Just reading the title makes me twitch with remembrances of Print Nightmare from a few years ago. This bug works in the same manner as those exploits. An authenticated attacker sends specially crafted messages to an affected system to gain arbitrary code execution. No user interaction is required. Let’s hope we don’t end up in a new nightmare of spooler exploits. Test and deploy this one quickly.

-    CVE-2026-23668 - Windows Graphics Component Elevation of Privilege Vulnerability
This vulnerability was submitted to the ZDI program by Marcin Wiązowski as two separate bugs, and it demonstrates the need for variant investigations when creating security patches. Both cases are caused by the lack of proper locking when performing operations on an object. However, in one case, it’s in the cdd.dll driver while the other is in the win32kfull driver. Either way, an attacker could use these to elevate privileges to SYSTEM and execute arbitrary code. Since the fix for both is to add object locking to the GDI object, the cases are combined into a single CVE. That’s not a problem, but it does show how variants can occur, and fixes should be as broad as possible.

Here’s the full list of CVEs released by Microsoft for March 2026:

CVE Title Severity CVSS Public Exploited Type CVE-2026-26127 .NET Denial of Service Vulnerability Important 7.5 Yes No DoS CVE-2026-21262 SQL Server Elevation of Privilege Vulnerability Important 8.8 Yes No EoP CVE-2026-23651 Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability Critical 6.7 No No EoP CVE-2026-26124 Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability Critical 6.7 No No EoP CVE-2026-26122 Microsoft ACI Confidential Containers Information Disclosure Vulnerability Critical 6.5 No No Info CVE-2026-21536 Microsoft Devices Pricing Program Remote Code Execution Vulnerability Critical 9.8 No No RCE CVE-2026-26144 Microsoft Excel Information Disclosure Vulnerability Critical 7.5 No No Info CVE-2026-26110 Microsoft Office Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-26113 Microsoft Office Remote Code Execution Vulnerability Critical 8.4 No No RCE CVE-2026-26125 Payment Orchestrator Service Elevation of Privilege Vulnerability Critical 8.6 No No EoP CVE-2026-26131 .NET Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-25177 Active Directory Domain Services Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-26117 Arc Enabled Servers - Azure Connected Machine Agent Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26130 ASP.NET Core Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-23661 Azure IoT Explorer Information Disclosure Vulnerability Important 7.5 No No Info CVE-2026-23662 Azure IoT Explorer Information Disclosure Vulnerability Important 7.5 No No Info CVE-2026-23664 Azure IoT Explorer Information Disclosure Vulnerability Important 7.5 No No Info CVE-2026-26121 Azure IOT Explorer Spoofing Vulnerability Important 7.5 No No Spoofing CVE-2026-26118 Azure MCP Server Tools Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-23667 Broadcast DVR Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-25190 GDI Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-25181 GDI+ Information Disclosure Vulnerability Important 7.5 No No Info CVE-2026-26030 * GitHub: CVE-2026-26030 Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable Important 9.9 No No RCE CVE-2026-23654 * GitHub: Zero Shot SCFoundation Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-26141 Hybrid Worker Extension (Arc-enabled Windows VMs) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-23665 † Linux Azure Diagnostic extension (LAD) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-23674 MapUrlToZone Security Feature Bypass Vulnerability Important 7.5 No No SFB CVE-2026-26123 Microsoft Authenticator Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-26148 † Microsoft Azure AD SSH Login extension for Linux Elevation of Privilege Vulnerability Important 8.1 No No EoP CVE-2026-25167 Microsoft Brokering File System Elevation of Privilege Vulnerability Important 7.4 No No EoP CVE-2026-26107 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-26108 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-26109 Microsoft Excel Remote Code Execution Vulnerability Important 8.4 No No RCE CVE-2026-26112 Microsoft Excel Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-26134 Microsoft Office Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26106 Microsoft SharePoint Server Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-26114 Microsoft SharePoint Server Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-26105 Microsoft SharePoint Server Spoofing Vulnerability Important 8.1 No No Spoofing CVE-2026-24283 Multiple UNC Provider Kernel Driver Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-25165 Performance Counters for Windows Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-24282 Push message Routing Service Elevation of Privilege Vulnerability Important 5.5 No No Info CVE-2026-26115 SQL Server Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-26116 SQL Server Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-20967 System Center Operations Manager (SCOM) Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-24285 Win32k Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-24291 Windows Accessibility Infrastructure (ATBroker.exe) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-25186 Windows Accessibility Infrastructure (ATBroker.exe) Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-23660 † Windows Admin Center in Azure Portal Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-24293 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-25176 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-25178 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-25179 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-23656 Windows App Installer Spoofing Vulnerability Important 5.9 No No Spoofing CVE-2026-25171 Windows Authentication Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-23671 Windows Bluetooth RFCOM Protocol Driver Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-24292 Windows Connected Devices Platform Service Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-24295 Windows Device Association Service Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-24296 Windows Device Association Service Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-25189 Windows DWM Core Library Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-25174 Windows Extensible File Allocation Table Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-25168 Windows Graphics Component Denial of Service Vulnerability Important 6.2 No No DoS CVE-2026-25169 Windows Graphics Component Denial of Service Vulnerability Important 6.2 No No DoS CVE-2026-23668 Windows Graphics Component Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-25180 Windows Graphics Component Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-25170 Windows Hyper-V Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-24297 Windows Kerberos Security Feature Bypass Vulnerability Important 6.5 No No SFB CVE-2026-24287 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-24289 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26132 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-24288 Windows Mobile Broadband Driver Remote Code Execution Vulnerability Important 6.8 No No RCE CVE-2026-25175 Windows NTFS Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-23669 Windows Print Spooler Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-24290 Windows Projected File System Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-23673 Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-25172 Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-25173 Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability Important 8 No No RCE CVE-2026-26111 Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-25185 Windows Shell Link Processing Spoofing Vulnerability Important 5.3 No No Spoofing CVE-2026-24294 Windows SMB Server Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-26128 Windows SMB Server Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-25166 Windows System Image Manager Assessment and Deployment Kit (ADK) Remote Code Execution Vulnerability Important 7.8 No No RCE CVE-2026-25188 Windows Telephony Service Elevation of Privilege Vulnerability Important 8.8 No No EoP CVE-2026-23672 Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-25187 Winlogon Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-3536 * Chromium: CVE-2026-3536 Integer overflow in ANGLE Critical N/A No No RCE CVE-2026-3538 * Chromium: CVE-2026-3538 Integer overflow in Skia Critical N/A No No RCE CVE-2026-3539 * Chromium: CVE-2026-3539 Object lifecycle issue in DevTools High N/A No No RCE CVE-2026-3540 * Chromium: CVE-2026-3540 Inappropriate implementation in WebAudio High N/A No No RCE CVE-2026-3541 * Chromium: CVE-2026-3541 Inappropriate implementation in CSS High N/A No No RCE CVE-2026-3542 * Chromium: CVE-2026-3542 Inappropriate implementation in WebAssembly High N/A No No RCE CVE-2026-3543 * Chromium: CVE-2026-3543 Inappropriate implementation in V8 High N/A No No RCE CVE-2026-3544 * Chromium: CVE-2026-3544 Heap buffer overflow in WebCodecs High N/A No No RCE CVE-2026-3545 * Chromium: CVE-2026-3545 Insufficient data validation in Navigation High N/A No No RCE

* Indicates this CVE had been released by a third party and is now being included in Microsoft releases.

† Indicates further administrative actions are required to fully address the vulnerability.

 

Looking at the other Critical-rated bugs in this month’s release, they are all cloud-native and require no user action. Microsoft has already remediated the vulnerabilities.

Moving on to the other code execution bugs, the vulnerabilities in SharePoint Server pop out first. Both require authentication, but it’s essentially the lowest level of authentication, so these would be ideal cases for lateral movement within an enterprise. There are the standard open-and-own cases within Office components. There an interesting sounding bug in the Windows Mobile Broadband Driver that requires physical access, but Microsoft doesn’t elaborate on the attack scenario beyond that fact. The bug in the System Image Manager Assessment and Deployment Kit (ADK) requires authentication. The bug in GDI requires user interaction. The remaining code execution bugs are in the RRAS protocol. We’ve seen bugs in this component in the past, but never in the wild. I wouldn’t ignore these, but I wouldn’t rush them out either.

Similar to last month, updates for Elevation of Privilege (EoP) bugs make up nearly half of this month’s release. And as we saw last month, but most simply lead to local attackers executing their code at SYSTEM-level privileges or administrative privileges. The bugs in SQL Server allow attackers to elevate to SQL sysadmin privileges. The bug in the Azure MCP Server is more complex. It allows attackers to obtain the permissions associated with the MCP Server’s managed identity, which lets them perform actions that the managed identity is able to reach. The bug in the Azure AD SSH Login extension for Linux leads to root access, and it won’t be easy to patch. You’ll need to run the update instructions from the command line on each affected system. That’s the same case for the bug in the Linux Azure Diagnostic extension (LAD). There’s an odd bug in the Hybrid Worker Extension (Arc‑enabled Windows VMs) that leads to “ELEVATED” privileges, which is something I’ve never seen before. The bug in the Broadcast DVR component allows an attacker to go from low integrity level up to medium. There’s a bug listed as an EoP in the Push message Routing Service, but reading the description, Microsoft notes it could lead to an information disclosure. It’s likely this is an error and should be an Information Disclosure bug. The final EoP is in the Azure Portal Windows Admin Center and leads to SYSTEM. However, there’s no patch to remediate this bug. Instead, you need to install the latest version of the Windows Admin Center extension through the Azure Portal by hand.

There are two security feature bypass patches in the March release. The first is a bypass of the MapURLToZone method, which (as expected) allows attackers to bypass MapURLToZone protections. The third bypass is in Kerberos and could allow an attacker to either view some sensitive information or make changes to “disclosed” information. This is a race condition that occurs while the group policy is being reapplied, so the window to exploit this would be extremely small.

Looking at the remaining info disclosure bugs getting patched this month, only two result in info leaks consisting of unspecified memory contents or memory addresses. Ther others provide more interesting results. There are three bugs in the Azure IoT Explorer have some wide-ranging implications. According to Microsoft, exploitation could result in, “device connection information, authentication tokens, request data, file paths, and other information transmitted between the application and the IoT Hub.” The bug in Authenticator almost reads like a security feature bypass, as exploit results in the disclosure of a one‑time sign‑in code or authentication deep link. The attacker would receive the sign‑in information and could potentially use it to authenticate as the user, allowing access to information or services available to that account. The last info disclosure bug is in the Accessibility Infrastructure and allows an attacker to gain secrets or privileged information belonging to the user of the affected application.

There are only four spoofing bugs in the March release. The first is in SharePoint server and manifests as an XSS. The second bug is a Server-Side Request Forgery (SSRF) in the Azure IoT Explorer. The remaining two are a bit more cryptic. The bug in Windows Shell Link Processing results from the “exposure of sensitive information to an unauthorized actor,” and could lead to spoofing. That sounds like credential exposure, but it’s not explicitly called out. The final spoofing bug results from the insufficient verification of data authenticity in Windows App Installer. Again, this sounds vaguely like credential reflection, but without further information, we can only speculate.

Finally, there are four denial-of-service (DoS) bugs in the release, including one that’s listed as publicly known in the .NET Framework. As usual, Microsoft provides no actionable information about these bugs.

No new advisories are being released this month.

Looking Ahead

I plan on being at RSA for the first time in my career, so if you’re around, please stop by and say hello. I like it when people say hello. Otherwise, I’ll be back on April 14 with my assessment of that patch Tuesday release. Until then, stay safe, happy patching, and may all your reboots be smooth and clean!

In this excerpt of a TrendAI Research Services vulnerability report, Nikolai Skliarenko and Yazhi Wang of the TrendAI Research team detail a recently patched command injection vulnerability in the Windows Notepad application. This bug was originally discovered by Cristian Papa and Alasdair Gorniak of Delta Obscura. Successful exploitation of this vulnerability could result in the execution of arbitrary commands in the security context of the victim's account. The following is a portion of their write-up covering CVE-2026-20841, with a few minimal modifications.

A remote code execution vulnerability has been reported in Microsoft Windows Notepad. The vulnerability is due to improper validation of links in Markdown files.

A remote attacker could exploit this vulnerability by enticing the victim to download and interact with a malicious file. Successful exploitation of this vulnerability could result in the execution of arbitrary commands in the security context of the victim's account.

The Vulnerability

Microsoft Windows comes with a default text-editing application called Windows Notepad. Historically, this application offered only minimal editing features. However, modern versions of Windows include an improved and extended Notepad by default. This new version supports multiple file formats, Markdown rendering, and Copilot-enhanced features.

Markdown is a lightweight markup language that allows users to create formatted text using a simple syntax. It is widely used for writing documents, blog posts, and README files. It supports a wide range of formatting options, including (but not limited to) headers, styled text, numbered and bulleted lists, and links. Markdown supports two main link formats: standard and inline. The standard link format is:

          [link-name](link/path)

When rendered, only the link text ("link-name") is shown to the user.

The inline links use the following format:

          <link/path>

When rendered, they are transformed into the equivalent standard link:

          [link/path](link/path)

A remote code execution vulnerability has been reported in Microsoft Windows Notepad. The vulnerability is due to improper validation of links when handling Markdown files.

When Notepad opens a file, if the application detects that the file requires special rendering (in this case, Markdown), the input file is tokenized. Tokenization in this context means splitting the raw file text into a sequence of small, recognizable pieces ("tokens") that the renderer can process one by one. Detection is performed based on the file extension. Only the ".md" extension was found to trigger Markdown rendering, as the application uses a fixed string comparison to determine whether Markdown should be rendered by calling sub_1400ED5D0(). Markdown files are rendered token by token.

Function sub_140170F60() handles clicking on links in Markdown files. It filters the link value, and passes it to ShellExecuteExW() call.

The filtering performed on the link is found to be insufficient, as it allows using malicious crafted protocol URIs, such as "file://" and "ms-appinstaller://", to execute arbitrary files in the security context of victim. ShellExecuteExW() uses the configured protocol handlers and may expose additional exploitable protocols depending on the system configuration.

A remote attacker could exploit this vulnerability by enticing the victim to download a malicious crafted Markdown file, open it, and click on a malicious link. Successful exploitation of this vulnerability could result in the execution of arbitrary commands in the security context of the victim's account.

Notes
• Files using the ".md" file extension are not registered to be opened by Notepad by default. However, when opened manually in Notepad, they are rendered as Markdown, which allows the vulnerability to be triggered.
• Any "\\" sequences are converted to "\" in the attacker-controlled link path prior to passing it to the ShellExecuteExW() call.

Source Code Walkthrough

The following code snippet was taken from Notepad.exe version 11.2508. Comments added by TrendAI researchers have been highlighted.

In sub_140170F60():

Detection Guidance

To detect an attack exploiting this vulnerability, the detection device must monitor and parse traffic on the following application protocols that can be used to deliver an attack to exploit this vulnerability:
• FTP, over ports 21/TCP, 20/TCP
• HTTP, over port 80/TCP
• HTTPS, over port 443/TCP
• IMAP, over port 143/TCP
• NFS, over ports 2049/TCP, 2049/UDP, 111/TCP, 111/UDP
• POP3, over port 110/TCP
• SMTP, over ports 25/TCP, 587/TCP
• SMB/CIFS, over ports 139/TCP, 445/TCP

The detection device must inspect traffic transferring a Markdown file with the file extension ".md". If such a file transfer is found, the detection device must search the file content for links.

The detection device must check whether the link paths contain the strings "file:" or "ms-appinstaller:".

If "file:" was found, the detection device must search the Markdown file contents using the following case-insensitive regular expression:

(\x3C|\[[^\x5d]+\]\()file:(\x2f|\x5c\x5c){4}

If "ms-appinstaller:" was found, the detection device must search the Markdown file contents using the following case-insensitive regular expression:

(\x3C|\[[^\x5d]+\]\()ms-appinstaller:(\x2f|\x5c\x5c){2}

If any of the regular expressions matches, the link contains a path to a remote resource. The traffic must be considered malicious; an attack exploiting this vulnerability is likely underway. This guidance should also detect the public PoC that was recently posted on GitHub.

Notes

•  The string matches are case-insensitive.
•  The detection guidance is based on the vendor-provided patch. However, the patch restricts the links to local-only files and HTTP(S) URIs, which may result in a huge number of false positives. Because of that, the detection guidance focuses on formats that may access and execute remote files. Due to that, it may result in false negatives.
•  The vulnerable function uses the configured protocol handlers and may expose additional exploitable protocols depending on the system configuration.

Conclusion

This vulnerability was patched by Microsoft in the February 2026 release cycle. They note no workarounds but do list user interaction as a prerequisite to exploitation. To fully remediate the vulnerability, the proper action is to test and deploy the provided vendor patch.

Special thanks to Nikolai Skliarenko and Yazhi Wang of the TrendAI Research team for providing such a thorough analysis of this vulnerability. For an overview of TrendAI Research services please visit https://go.trendmicro.com/tis/vulnerabilities.html.

The threat research team will be back with other great vulnerability analysis reports in the future. Until then, follow the team on Twitter, Mastodon, LinkedIn, or Bluesky for the latest in exploit techniques and security patches.

I have survived the biggest Pwn2Own ever, but I’m back in Tokyo for the second Patch Tuesday of 2026. My location never stops Patch Tuesday from coming, so let’s take a look at the latest security patches from Adobe and Microsoft. If you’d rather watch the full video recap covering the entire release, you can check it out here:

Adobe Patches for February 2026

For February, Adobe released nine bulletins addressing 44 unique CVEs in Adobe Audition, After Effects, InDesign, Substance 3D Designer, Substance 3D Stager, Adobe Bridge, Substance 3D Modeler, Lightroom Classic, and the Adobe DNG Software Development Kit (SDK). The largest update here is for After Effects, which fixes 13 Critical and two Important rated bugs. The patch for Substance 3D Designer is on the larger side with seven fixes, but only two of those are Critical. On the other hand, the fix for Substance 3D Stager corrects five Critical-rated bugs that could lead to code execution. The Audition patch fixes six bugs, but only one is Critical.

The other patches are smaller in size. The fix for the Adobe DNG Software Development Kit (SDK) corrects two Critical and two Important-rated bugs. The InDesign patch fixes three bugs, but only one is Critical. The update for Adobe Bridge fixes two Critical bug that could lead to code execution. The patch for Lightroom Classic addresses a single Critical bug, and the release is wrapped up with a patch for Substance 3D Modeler that fixes a single, Important-rated memory link.

None of the bugs fixed by Adobe this month are listed as publicly known or under active attack at the time of release, and all of the updates released by Adobe this month are listed as deployment priority 3.

Microsoft Patches for February 2026

This month, Microsoft drops 58 new CVEs in Windows and Windows components, Office and Office Components, Azure, Microsoft Edge (Chromium-based), .NET and Visual Studio, GitHub Copilot, Mailslot FS, Exchange Server, Internet Explorer (!), Power BI, Hyper-V Server, and the Windows Subsystem for Linux. Counting the third-party and Chromium updates listed in the release, it brings the total number of CVEs to 62. One of the bugs in the Windows Graphics component was submitted through the ZDI program. Five of these bugs are rated Critical, two are rated Moderate, and the rest are rated Important in severity.

It’s typical to see this number of CVEs released in February, but the number of bugs under active attack is extraordinarily high. Microsoft lists six bugs being exploited at the time of release, with three of these listed as publicly known. Last month only had a single bug being exploited, although there were twice as many CVEs patched. We’ll see if we’re on our way to another “hot exploit summer” as we saw a few years ago or if this is just an aberration.

Let’s take a closer look at some of the more interesting updates for this month, starting with the bugs under active attack:

-    CVE-2026-21510 - Windows Shell Security Feature Bypass Vulnerability
This bug is listed as a security feature bypass, but it could also be classified as code execution. An attacker can bypass Windows SmartScreen and Windows Shell security prompts to execute code on a target system. This bug is also listed as publicly known, but Microsoft doesn’t say where. There is user interaction here, as the client needs to click a link or a shortcut file. Still, a one-click bug to gain code execution is a rarity. Definitely test and deploy this fix quickly.

-    CVE-2026-21514 - Microsoft Word Security Feature Bypass Vulnerability
This bug also requires user interaction in the form of opening a Word document, but that’s all that’s required to bypass protections to dangerous COM/OLE controls. Thankfully, the Preview Pane is not an attack vector here. However, users are well known to open lots of documents they receive in e-mail. This bypass could also result in code execution if the right COM/OLE control is hit. This is also listed as publicly known, so add this to the list to test and deploy quickly.

-    CVE-2026-21519 - Desktop Window Manager Elevation of Privilege Vulnerability
This is the second month in a row that a DWM was listed as being exploited in the wild. That leads me to believe the first patch didn’t completely resolve the vulnerability. Same as last month, this bug allows attackers to run code with SYSTEM privileges. Bugs of this type are typically paired with a code execution bug to take over a system. As always, Microsoft offers no indication of how widespread these exploits may be.

-    CVE-2026-21533 - Windows Remote Desktop Services Elevation of Privilege Vulnerability
Don’t let the word “Remote” in the title fool you – this is a local bug that allows attackers to run code with SYSTEM privileges. It’s interesting that Microsoft lists “Improper privilege management” as the root cause for this issue. If the system is running Remote Desktop Services, it’s probably a juicy target for attackers to move laterally after an initial breach. Add this one to the list of patches to test and deploy immediately.

-    CVE-2026-21513 - Internet Explorer Security Feature Bypass Vulnerability
Although long gone by many measurements, IE does still exist on Windows systems, and calling it always results in a vulnerability somehow. This bug manifests similarly to the Shell bug above, as it requires user interaction but could result in code execution. The bypass here is simply the ability to reach IE, which shouldn’t be possible. Again, test and deploy this fix quickly.

-    CVE-2026-21525 - Windows Remote Access Connection Manager Denial of Service Vulnerability
It’s unusual to see DoS bugs being used in active attacks, but that’s what we have here. A null pointer deref in the Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally. Most null pointer derefs cause the application or service to crash, but it’s not clear if it will automatically restart. I would exercise caution and patch quickly either way.

Here’s the full list of CVEs released by Microsoft for February 2026:

CVE Title Severity CVSS Public Exploited TYPE CVE-2026-21514 Microsoft Word Security Feature Bypass Vulnerability Important 7.8 Yes Yes SFB CVE-2026-21510 Windows Shell Security Feature Bypass Vulnerability Important 8.8 Yes Yes SFB CVE-2026-21513 Internet Explorer Security Feature Bypass Vulnerability Important 8.8 Yes Yes SFB CVE-2026-21519 Desktop Window Manager Elevation of Privilege Vulnerability Important 7.8 No Yes EoP CVE-2026-21533 Windows Remote Desktop Services Elevation of Privilege Vulnerability Important 7.8 No Yes EoP CVE-2026-21525 Windows Remote Access Connection Manager Denial of Service Vulnerability Moderate 6.2 No Yes DoS CVE-2026-21511 Microsoft Outlook Spoofing Vulnerability Important 7.5 No No Spoofing CVE-2023-2804 * Red Hat, Inc. CVE-2023-2804: Heap Based Overflow libjpeg-turbo Important 6.5 Yes No RCE CVE-2026-24302 Azure Arc Elevation of Privilege Vulnerability Critical 8.6 No No EoP CVE-2026-24300 Azure Front Door Elevation of Privilege Vulnerability Critical 9.8 No No EoP CVE-2026-21532 Azure Function Information Disclosure Vulnerability Critical 8.2 No No Info CVE-2026-21522 Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability Critical 6.7 No No EoP CVE-2026-23655 Microsoft ACI Confidential Containers Information Disclosure Vulnerability Critical 6.5 No No Info CVE-2026-21218 .NET and Visual Studio Spoofing Vulnerability Important 7.5 No No Spoofing CVE-2026-21512 Azure DevOps Server Cross-Site Scripting Vulnerability Important 6.5 No No XSS CVE-2026-21529 † Azure HDInsight Spoofing Vulnerability Important 5.7 No No Spoofing CVE-2026-21528 Azure IoT Explorer Information Disclosure Vulnerability Important 6.5 No No Info CVE-2026-21228 Azure Local Remote Code Execution Vulnerability Important 8.1 No No RCE CVE-2026-21531 Azure SDK for Python Remote Code Execution Vulnerability Important 9.8 No No RCE CVE-2026-21251 Cluster Client Failover (CCF) Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-20846 GDI+ Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-21523 GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability Important 8 No No RCE CVE-2026-21518 GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability Important 6.5 No No SFB CVE-2026-21257 GitHub Copilot and Visual Studio Elevation of Privilege Vulnerability Important 8 No No EoP CVE-2026-21256 GitHub Copilot and Visual Studio Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-21516 GitHub Copilot for Jetbrains Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-21253 Mailslot File System Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-21537 † Microsoft Defender for Endpoint Linux Extension Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-21259 Microsoft Excel Elevation of Privilege Vulnerability Important 7.3 No No EoP CVE-2026-21258 Microsoft Excel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-21261 Microsoft Excel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-21527 Microsoft Exchange Server Spoofing Vulnerability Important 6.5 No No Spoofing CVE-2026-21260 Microsoft Outlook Spoofing Vulnerability Important 7.5 No No Spoofing CVE-2026-21229 Power BI Remote Code Execution Vulnerability Important 8 No No RCE CVE-2026-21236 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-21238 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-21241 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-21517 Windows App for Mac Installer Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-21234 Windows Connected Devices Platform Service Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-21235 Windows Graphics Component Elevation of Privilege Vulnerability Important 7.3 No No EoP CVE-2026-21246 Windows Graphics Component Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-21232 Windows HTTP.sys Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-21240 Windows HTTP.sys Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-21250 Windows HTTP.sys Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-21244 Windows Hyper-V Remote Code Execution Vulnerability Important 7.3 No No RCE CVE-2026-21247 Windows Hyper-V Remote Code Execution Vulnerability Important 7.3 No No RCE CVE-2026-21248 Windows Hyper-V Remote Code Execution Vulnerability Important 7.3 No No RCE CVE-2026-21255 Windows Hyper-V Security Feature Bypass Vulnerability Important 8.8 No No SFB CVE-2026-21231 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-21239 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-21245 Windows Kernel Elevation of Privilege Vulnerability Important 7.8 No No EoP CVE-2026-21222 Windows Kernel Information Disclosure Vulnerability Important 5.5 No No Info CVE-2026-21243 Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability Important 7.5 No No DoS CVE-2026-20841 Windows Notepad App Remote Code Execution Vulnerability Important 8.8 No No RCE CVE-2026-21249 Windows NTLM Spoofing Vulnerability Important 3.3 No No Spoofing CVE-2026-21508 Windows Storage Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-21237 Windows Subsystem for Linux Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-21242 Windows Subsystem for Linux Elevation of Privilege Vulnerability Important 7 No No EoP CVE-2026-1861 * Chromium: CVE-2026-1861 Heap buffer overflow in libvpx High N/A No No RCE CVE-2026-1862 * Chromium: CVE-2026-1862 Type Confusion in V8 High N/A No No RCE CVE-2026-0391 Microsoft Edge (Chromium-based) for Android Spoofing Vulnerability Moderate 6.5 No No Spoofing

* Indicates this CVE had been released by a third party and is now being included in Microsoft releases.

† Indicates further administrative actions are required to fully address the vulnerability.

 

Moving on to the Critical-rated bugs, the patch for Azure Front Door sounds frightening, but Microsoft has already fixed the bug and is just now documenting it. That’s also true for the bugs in Azure Arc and Azure Function. There are two Critical-rated bugs in the ACI Confidential Containers. The first allows a container escape while the second discloses secret tokens and keys. Either way, you’ll want to handle those quickly.

Taking a look at the other code execution vulnerabilities in this month’s release, we start with a frightening looking bug in Azure SDK for Python that has the highest CVSS this month of 9.8. A remote, unauthenticated attacker code gain code execution on an affected system via a maliciously crafted continuation token. It’s not clear why this isn’t rated Critical, but I would treat it as such. The three bugs in Hyper-V are actually local open-and-own bugs that require a user to open a malicious file on an affected system. That’s also true for the bug in Notepad. The bug in Power BI is confusing, because Microsoft says it requires authentication and could lead to an attacker running code as an authenticated user. There’s the poorly named “Azure Local Remote Code Execution Vulnerability”, but it requires a machine-in-the-middle (MitM) to exploit. The bug in Defender for Endpoint Linux is restricted to local subnets, but you’ll need to enable auto provisioning to get the patch. The final code execution bugs addressed this month are in GitHub Copilot. Two are command injections and the other is a Time-of-check time-of-use (toctou) race condition, but both could end up in code execution on affected systems.

Patches for Elevation of Privilege (EoP) bugs make up nearly 50% of this release, but most simply lead to local attackers executing their code at SYSTEM-level privileges or administrative privileges. There are only two of note. The first is a command injection bug in GitHub Copilot that leads to executing code at the level of the targeted application. The second is a bug in a kernel that leads to SYSTEM but could also be used for a sandbox escape.

There’s a unusually high number of spoofing bugs in this month’s release, and the ones for Outlook are the most troubling. First, the Preview Pane is an attack vector. Secondly, the bugs could be used to relay NTLM credentials via just an email, which could result in credential disclosure. And you’ll need multiple patches to fully address these bugs. At least they can be applied in any order.  There’s a UI misrepresentation bug in Exchange Server that could allow an attacker to either view some sensitive information or “make changes to disclosed information”. At what point does data become disclosed? That odd phrasing makes me think they are using AI to right some of their descriptions. The phrasing also appears in the patch for NTLM. That bug is triggered by opening a specially crafted Office doc, and while they explicitly say it could be used to relay NTLM creds, it sure seems that way. The patch for .NET and Visual Studio fixes a bug that allows attackers to bypass header validation, resulting in the service accepting a message it should reject. Finally, the bug in Azure HDInsight is really just a cross-site scripting (XSS) bug. The caveat here is that you need to restart Ambari server in both of the head nodes to have this fix updated. There is also an XSS in Azure Devops Server, but at least it is labelled as such.

There are a couple of additional security feature bypass bugs to discuss. The first is in Hyper-V and bypasses the Virtualization-based Security feature. The other is in GitHub Copilot and Visual Studio Code. It’s another command injection, but this one can be used to bypass authentication. Neat.

Looking at the remaining info disclosure bugs getting patched this month, most simply result in info leaks consisting of unspecified memory contents or memory addresses. The exception is the bug in Azure IoT Explorer. This bug could be used to view the contents of the target user’s local file system.

We end this month’s release with two DoS bugs: one in LDAP and one in GDI+. Neither descriptions from Microsoft provide any usable information.

No new advisories are being released this month.

Looking Ahead

I plan on being back home for the March release but wherever I’m at, you can rest assured that March 10, I’ll be here to provide my assessment of the release. Until then, stay safe, happy patching, and may all your reboots be smooth and clean!

In this excerpt of a TrendAI Research Services vulnerability report, Jonathan Lein and Simon Humbert of the TrendAI Research team detail a recently patched command injection vulnerability in the Arista NG Firewall. This bug was originally discovered by Gereon Huppertz and reported through the TrendAI Zero Day Initiative (ZDI) program. Successful exploitation could result in arbitrary command execution under the security context of the root user. The following is a portion of their write-up covering CVE-2025-6798, with a few minimal modifications.

A command injection vulnerability has been reported in Arista NG Firewall. The vulnerability is due to improper validation of user data in the diagnostics component.

A remote, authenticated attacker could exploit this vulnerability by sending crafted requests to the target server. Successful exploitation could result in arbitrary command execution under the security context of the root user.

The Vulnerability

Arista NG Firewall is an open-source firewall appliance. It was originally developed under the name Untangle. Some features of Arista Firewall include spam blocking, bandwidth control, and IPS, etc. NG Firewall can be managed through a web user interface, or a JSON-RPC API using HTTP.

HTTP is a request/response protocol described in RFCs 7230 - 7237 and other RFCs. A request is sent by a client to a server, which in turn sends a response back to the client. An HTTP request consists of a request line, various headers, an empty line, and an optional message body

where CRLF represents the new line sequence Carriage Return (CR) followed by Line Feed (LF). SP represents a space character. Parameters can be passed from the client to the server as name-value pairs in either the Request-URI, or in the message-body, depending on the Method used and Content-Type header. For example, a simple HTTP request passing a parameter named “param” with value “1”, using the GET method might look like:

A corresponding HTTP request using the POST method might look like:

If there is more than one parameter/value pair, they are encoded as '&'-delimited name=value pairs:

          var1=value1&var2=value2&var3=value3...

The component relevant to this report is the JSON-RPC endpoint. A JSON object has the following syntax:

•            An object is enclosed in curly braces {}.
•            An object consists of zero or more items delimited by a comma (",") character.
•            An item consists of a key and a value. A key is delimited from its value by a colon (":") character.
•            A key must be a string (enclosed in quotes).
•            A value must be a valid type. Valid types include string, number, JSON object, array, Boolean, or null.
•            An array is an object enclosed in square braces []. An array consists of zero or more string, number, JSON object, array, Boolean or null type-objects delimited by a comma (",") character.

An example JSON object is as follows:

The following is an example of a JSON-RPC request to the runTroubleshooting() method that is relevant to this report:

A command injection vulnerability has been reported in Arista NG Firewall. The vulnerability is due to improper validation of user data that is used in a command line. The runTroubleshooting() method of the class NetworkManagerImpl will be used to handle JSON-RPC requests to the runTroubleshooting method. The command parameter passed to the method will be the first element in the params JSON array in the body of the request. This value must be one of the strings in the TroubleshootingCommands enum defined in the NetworkManager class. The second parameter of the method will contain additional arguments passed to the JSON-RPC call.

The method will first iterate through each of the additional arguments and combine each key value pair into a single string, separated by a "=" character that will later be used as an environment variable. Next, a switch case statement is used to ensure the provided command is one of the values in TroubleshootingCommands. Each command value will be processed using the same code.

The method will next iterate through each environment variable, and inspect it for the following common command injection strings:

          ; & | > $(

If any are found, the request will be rejected, and an exception is thrown. If each environment variable is valid, the method execEvil() is called to create and execute a command line for the network-troubleshooting.sh script, with the environment variables passed as a parameter. The execEvil() method in turn will call Runtime.getRuntime().exec() to run the script, with the second parameter passing the environment variables that will be used by the script. Each command value will have a function in network-troubleshooting.sh, such as run_dns() for the “DNS” command value. Each function will follow a similar structure, by creating a CMD string using the environment variables passed by exec() and then calling eval to execute it.

However, the values of the parameters passed to the runTroubleshooting JSON-RPC method are not completely sanitized before it is used in the command line. While the parameters passed to the endpoint are inspected for some shell metacharacters, the list is incomplete. For example, the backtick character (`) is not included in the check and may be used to inject a command.

For example:

The example above will write and execute a python script on the server to achieve code execution without using any restricted characters.

A remote, authenticated attacker could exploit this vulnerability by sending a JSON-RPC request to the runTroubleshooting method containing a crafted “HOST” or “URL” parameter containing shell metacharacters not present in the runTroubleshooting() check. Successful exploitation in the worst case will result in arbitrary command execution under the security context of the root user.

Detection Guidance

To detect an attack exploiting this vulnerability, the detection device must monitor and parse traffic on the following ports:
          - HTTP, over port 80/TCP
          - HTTPS, over port 443/TCP

Traffic to Arista NG Firewall may be encrypted and must be decrypted prior to applying this guidance.

The detection device must search for HTTP POST requests made to the request-URI /admin/JSON-RPC. If found, the body of the request must be parsed as JSON. The JSON object in the body must be inspected for a method key, and its value must be inspected to contain the substring runTroubleshooting. If found, the object must also be inspected for the JSON key "params", with a value containing a JSON array. The first entry in the JSON array must be inspected for any of the following strings:

If found, the second entry in the array must be inspected for a JSON object, and inspected for any of the following keys:

If either is found, the corresponding value to the key must be inspected for any of the following command injection characters:

If found, the traffic should be treated as suspicious; an attack exploiting this vulnerability is likely underway.

The following regular expression can be applied to find malicious requests:

          /\x22(HOST|URL)\x22\s*:\s*\x22(?:[^\x22\\]|\\.)*?[\x60\x27\x24\x3c]/

Notes:

• String matching on the request-URI and all JSON strings should be done in a case sensitive manner.
• The JSON strings may be encoded and must be decoded prior to applying this guidance.
• The request-URI may be URL-encoded and must be decoded before applying this guidance.

Conclusion

This vulnerability has been addressed by Arista with their Security Advisory 0123. They note that the Arista Edge Threat Management - Arista Next Generation Firewall (Formerly Untangle) is affected by this bug, but other product versions are not. They also state the following mitigation can be applied:

Do not allow non-authorized administrative access or access to the administrative browser.

However, the more appropriate action is to apply the provided vendor security patch by upgrading to version 17.4 or higher.

Special thanks to Jonathan Lein and Simon Humbert of the TrendAI Research team for providing such a thorough analysis of this vulnerability. For an overview of TrendAI Research services, please visit https://go.trendmicro.com/tis/vulnerabilities.html.

The threat research team will be back with other great vulnerability analysis reports in the future. Until then, follow the team on Twitter, Mastodon, LinkedIn, or Bluesky for the latest in exploit techniques and security patches.