Description
Weak authentication in Windows Active Directory Certificate Services allows an authorized attacker to elevate privileges over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.7601.0 – < 6.1.7601.27670 | 6.1.7601.27670 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.1.7601.0 – < 6.1.7601.27670 | 6.1.7601.27670 |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.6003.0 – < 6.0.6003.23220 | 6.0.6003.23220 |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.6003.0 – < 6.0.6003.23220 | 6.0.6003.23220 |
| Microsoft | Windows Server 2012 | 6.2.9200.0 – < 6.2.9200.25423 | 6.2.9200.25423 |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 – < 6.2.9200.25423 | 6.2.9200.25423 |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 – < 6.3.9600.22523 | 6.3.9600.22523 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 – < 6.3.9600.22523 | 6.3.9600.22523 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – < 10.0.14393.7969 | 10.0.14393.7969 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – < 10.0.14393.7969 | 10.0.14393.7969 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – < 10.0.17763.7136 | 10.0.17763.7136 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – < 10.0.17763.7136 | 10.0.17763.7136 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – < 10.0.20348.3453 | 10.0.20348.3453 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – < 10.0.25398.1551 | 10.0.25398.1551 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – < 10.0.26100.3775 | 10.0.26100.3775 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – < 10.0.26100.3775 | 10.0.26100.3775 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
-
Dannners/CVE-2025-27740_POC ★ 1 · Oct 27, 2026
CVE-2025-27740 — AD CS Subject Key Identifier Injection
-
tyie949/cve-2025-27740 ★ 0 · Oct 28, 2026
Proof-of-concept exploit for CVE-2025-27740 Subject Key Identifier injection in Active Directory Certificate Services
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- WID-SEC-2025-0744 Microsoft Windows: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2025
- MSRC-CVE-2025-27740 Active Directory Certificate Services Elevation of Privilege Vulnerability Microsoft Security Response Center · Apr 10, 2025
- NCSC-2025-0112 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Apr 8, 2025
References
- Active Directory Certificate Services Elevation of Privilege Vulnerability vendor-advisory patch