CVE-2025-27740
Active Directory Certificate Services Elevation of Privilege Vulnerability
Weak authentication in Windows Active Directory Certificate Services allows an authorized attacker to elevate privileges over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Active Directory Certificate Services Elevation of Privilege Vulnerability
Weak authentication in Windows Active Directory Certificate Services allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2025-27740- CVSS 3.1
- 8.8 High
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 - Weakness
- CWE-1390
- Updated
- 2026-11-02
EUVDEUVD-2025-10142
Weak authentication in Windows Active Directory Certificate Services allows an authorized attacker to elevate privileges over a network.
- Record
EUVD-2025-10142- CVSS 3.1
- 8.8 High
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-w4rq-mvcf-xc7h
Weak authentication in Windows Active Directory Certificate Services allows an authorized...
Weak authentication in Windows Active Directory Certificate Services allows an authorized attacker to elevate privileges over a network.
- Record
GHSA-w4rq-mvcf-xc7h- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1390
- Updated
- 2026-11-02
NVD
Weak authentication in Windows Active Directory Certificate Services allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2025-27740- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1390
- Updated
- 2026-11-02
Affected products
- microsoft windows server 2008 r2 service pack 1
- microsoft windows server 2008 r2 service pack 1 (server core installation)
- microsoft windows server 2008 service pack 2
- microsoft windows server 2008 service pack 2 (server core installation)
- microsoft windows server 2012
- microsoft windows server 2012 (server core installation)
- microsoft windows server 2012 r2
- microsoft windows server 2012 r2 (server core installation)
- microsoft windows server 2016
- microsoft windows server 2016 (server core installation)
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | Dannners/CVE-2025-27740_POC | 2026-10-27 |
| PoC in GitHub | tyie949/cve-2025-27740 | 2026-10-28 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-27740 is a high vulnerability (CVSS 8.8) in Microsoft Windows Server 2008 R2 Service Pack 1, published April 8, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 3.52%, the 89th percentile. No source names a fixed version.