Improper Authentication in Windows Server - CVE-2025-27740
Published: April 8, 2025
Vulnerability identifier: #VU107241
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-27740
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error when processing authentication requests in Active Directory Certificate Services. A remote user can bypass authentication process and gain unauthorized access to the application.
Affected software
Windows Server
How to mitigate CVE-2025-27740
Install update from vendor's website.
Windows Server - addressed in versions 2008 R2 6.1.7601.27670, 2008 6.0.6003.23220, 2012 R2 6.3.9600.22523, 2012 6.2.9200.25423, 2016 10.0.14393.7970, 2019 10.0.17763.7137, 2022 23H2 10.0.25398.1551, 2022 10.0.20348.3454, 2025 10.0.26100.3775