CVE-2026-54121: high-severity vulnerability in Microsoft Windows 10 Version 1607
Active Directory Certificate Services Elevation of Privilege Vulnerability
Published · Updated
46Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.8epss 0.8%
from disclosure to weapon9 days
Published on NVDJul 14
1st PoC+9d
exploitation probability
0.8%top 45% of all CVEs
observed exploitation
nono source reports it
15 public exploit(s)
Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges over a network.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Windows 10 Version 1607Microsoft · Windows 10 Version 1809Microsoft · Windows Server 2012Microsoft · Windows Server 2012 R2Microsoft · Windows Server 2012 R2 (Server Core installation)Microsoft · Windows Server 2012 (Server Core installation)Microsoft · Windows Server 2016Microsoft · Windows Server 2016 (Server Core installation)Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)public PoCs found — 15
githubgithub.com/aniqfakhrul/CVE-2026-54121★ 332githubgithub.com/ZeroDayEvil/CVE-2026-54121-Certighost★ 88githubgithub.com/tc4dy/CVE-2026-54121-PoC-Exploit★ 30githubgithub.com/ZeroDayEvil/CVE-2026-54121★ 26githubgithub.com/marcgoam/CVE-2026-54121-CertiGhost★ 11githubgithub.com/nafiez/Metasploit-CVE-2026-54121-Certighost★ 4githubgithub.com/0xBlackash/CVE-2026-54121★ 2githubgithub.com/ChPratik/CVE-2026-54121★ 1githubgithub.com/TryA9ain/Certighost_CVE-2026-54121★ 1githubgithub.com/KrakenEU/CVE-2026-54121-CertiGhost★ 1githubgithub.com/AtlasVector/Certighost-CVE-2026-54121★ 0githubgithub.com/HORKimhab/CVE-2026-54121★ 0githubgithub.com/L0u7r3/certighost★ 0githubgithub.com/sam00/POC-CVE-2026-54121-Certighost★ 0githubgithub.com/GlendonNotGlen/certighost-cve-2026-54121-slides★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Microsoft Windows 10 Version 1607
In the same product, most dangerous first.
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