CTF Time

Name: ATLA Opening Date CTF (an ATLA Opening Date CTF event.)
Date: Sept. 20, 2025, 5 a.m. — 20 Sept. 2025, 13:00 UTC  [add to calendar]
Format: Jeopardy
On-site
Location: Kyrgyzstan, Bishkek
Offical URL: https://ctf.atlabyte.com/
Rating weight: 0
Event organizers: ATLA CTF

Name: Holmes CTF 2025 (an Hack The Box CTF event.)
Date: Sept. 22, 2025, 1 p.m. — 26 Sept. 2025, 19:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.hackthebox.com/event/details/holmes-ctf-2025-2536
Rating weight: 24.00
Event organizers: Hack The Box

Name: InfiniteCTF Qualifiers (an InfiniteCTF event.)
Date: Sept. 27, 2025, 7 p.m. — 28 Sept. 2025, 03:00 UTC  [add to calendar]
Format: Attack-Defense
On-line
Offical URL: https://register.redteamassociation.com/
Rating weight: 0.00
Event organizers: Red Team Association

Name: SunshineCTF 2025 (an SunshineCTF event.)
Date: Sept. 27, 2025, 2 p.m. — 29 Sept. 2025, 14:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://sunshinectf.org/
Rating weight: 51.65
Event organizers: Knightsec

Name: FAUST CTF 2025 (an FAUST CTF event.)
Date: Sept. 27, 2025, noon — 27 Sept. 2025, 21:00 UTC  [add to calendar]
Format: Attack-Defense
On-line
Offical URL: https://2025.faustctf.net/
Rating weight: 92.50
Event organizers: FAUST

Name: DFIR Labs Digital Forensics Challenge by The DFIR Report (an DFIR Labs CTF event.)
Date: Sept. 27, 2025, 4:30 p.m. — 27 Sept. 2025, 20:30 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://dfirlabs.thedfirreport.com/dfirchallenge
Rating weight: 0
Event organizers: The DFIR Report

Name: Iran Tech Olympics CTF 2025 (an Iran Tech Olympics CTF event.)
Date: Sept. 26, 2025, 1 p.m. — 27 Sept. 2025, 13:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.olympics.tech/
Rating weight: 25.00
Event organizers: ASIS

Name: HackornCTF 2025 Quals (an Hackorn event.)
Date: Sept. 25, 2025, midnight — 25 Sept. 2025, 23:59 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.secpen.org/
Rating weight: 0
Event organizers: Hackorn

Name: Srdnlen CTF 2025 Finals (Sardinia Cyber Camp) (an Srdnlen CTF event.)
Date: Sept. 25, 2025, 10 a.m. — 25 Sept. 2025, 22:00 UTC  [add to calendar]
Format: Jeopardy
On-site
Location: Italy, Cagliari
Offical URL: https://ctf.srdnlen.it/
Rating weight: 25.00
Event organizers: Srdnlen

Name: CrewCTF 2025 (an CrewCTF event.)
Date: Sept. 19, 2025, 9 p.m. — 21 Sept. 2025, 21:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://2025.crewc.tf/
Rating weight: 38.93
Event organizers: thehackerscrew

Name: Ctrl+Space CTF Quals (an Ctrl+Space CTF event.)
Date: Sept. 20, 2025, 9 a.m. — 21 Sept. 2025, 08:59 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctrl-space.gg/
Rating weight: 25.00
Event organizers: ESA

Name: K17 CTF (an K17 CTF event.)
Date: Sept. 19, 2025, 8 a.m. — 21 Sept. 2025, 08:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.secso.cc/
Rating weight: 24.83
Event organizers: K17

Name: CDCTF 2025 (an CDCTF event.)
Date: Sept. 20, 2025, 3 p.m. — 21 Sept. 2025, 03:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://uacrimsondefense.github.io/cdctf.html
Rating weight: 25.00
Event organizers: Crimson Defense

Name: CyberKumbez 2025 (an CyberKumbez event.)
Date: Sept. 17, 2025, 10 a.m. — 19 Sept. 2025, 16:00 UTC  [add to calendar]
Format: Attack-Defense
On-site
Location: Astana, Kazakhstan
Offical URL: https://kazhackstan.com/
Rating weight: 0.00
Event organizers: KazHackStan

Name: VolgaCTF 2025 Final (an VolgaCTF Final event.)
Date: Sept. 18, 2025, 6 a.m. — 18 Sept. 2025, 15:00 UTC  [add to calendar]
Format: Attack-Defense
On-site
Location: Russia. Samara
Offical URL: https://volgactf.ru/en/volgactf-2025/final/
Rating weight: 12.40
Event organizers: VolgaCTF.org

Name: CTF@AC - Quals (an CTF@AC event.)
Date: Sept. 14, 2025, 9 a.m. — 15 Sept. 2025, 09:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.ac.upt.ro/
Rating weight: 24.53
Event organizers: UPT-CTF

Name: CSAW CTF Qualification Round 2025 (an CSAW CTF Qualification Round event.)
Date: Sept. 12, 2025, 4 p.m. — 14 Sept. 2025, 16:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.csaw.io/
Rating weight: 16.47
Event organizers: NYUSEC

Name: 07CTF (an 07CTF event.)
Date: Sept. 13, 2025, 6:30 a.m. — 14 Sept. 2025, 18:30 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.0bscuri7y.xyz/
Rating weight: 23.75
Event organizers: 0bscuri7y

Name: Alfa Surfing CTF (an Alfa CTF event.)
Date: Sept. 13, 2025, 9 a.m. — 14 Sept. 2025, 15:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://alfactf.ru/
Rating weight: 21.67
Event organizers: SPbCTF

Name: DefCamp Capture the Flag (D-CTF) 2025 Quals (an Defcamp CTF Qualification event.)
Date: Sept. 12, 2025, 10 a.m. — 14 Sept. 2025, 10:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://dctf25-quals.cyber-edu.co/
Rating weight: 50.00
Event organizers: CCSIR.org