CVE-2026-21239 | Microsoft Windows up to Server 2025 Kernel heap-based overflow
A vulnerability labeled as critical has been found in Microsoft Windows. The impacted element is an unknown function of the component Kernel. The manipulation results in heap-based buffer overflow.
This vulnerability is cataloged as CVE-2026-21239. The attack must be initiated from a local position. There is no exploit available.
Applying a patch is advised to resolve this issue.