Improper Authentication in Windows and Windows Server - CVE-2025-21349
Published: February 11, 2025
Vulnerability identifier: #VU103825
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-21349
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error when processing authentication requests in Windows Remote Desktop Configuration Service. A remote attacker can perform a man-in-the-middle (MitM) attack, bypass authentication process and gain unauthorized access to the application.
How to mitigate CVE-2025-21349
Install updates from vendor's website.