# CVE-2025-27740

## Summary

- **CVE ID:** CVE-2025-27740
- **Severity:** HIGH
- **CVSS Score:** 8.8 (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)
- **CWE:** CWE-1390
- **Published:** Apr 8, 2025
- **Last Modified:** Aug 10, 2026

## Description

Weak authentication in Windows Active Directory Certificate Services allows an authorized attacker to elevate privileges over a network.

## Affected Products

- Microsoft — Windows Server 2008 R2 Service Pack 1 (6.1.7601.0)
- Microsoft — Windows Server 2008 R2 Service Pack 1 (Server Core installation) (6.1.7601.0)
- Microsoft — Windows Server 2008 Service Pack 2 (6.0.6003.0)
- Microsoft — Windows Server 2008 Service Pack 2 (Server Core installation) (6.0.6003.0)
- Microsoft — Windows Server 2012 (6.2.9200.0)
- Microsoft — Windows Server 2012 (Server Core installation) (6.2.9200.0)
- Microsoft — Windows Server 2012 R2 (6.3.9600.0)
- Microsoft — Windows Server 2012 R2 (Server Core installation) (6.3.9600.0)
- Microsoft — Windows Server 2016 (10.0.14393.0)
- Microsoft — Windows Server 2016 (Server Core installation) (10.0.14393.0)
- Microsoft — Windows Server 2019 (10.0.17763.0)
- Microsoft — Windows Server 2019 (Server Core installation) (10.0.17763.0)
- Microsoft — Windows Server 2022 (10.0.20348.0)
- Microsoft — Windows Server 2022, 23H2 Edition (Server Core installation) (10.0.25398.0)
- Microsoft — Windows Server 2025 (10.0.26100.0)
- Microsoft — Windows Server 2025 (Server Core installation) (10.0.26100.0)

## References

- [CNA](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27740)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 3.42%
- **EPSS Percentile:** 88.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._