CVE-2025-55340

Windows Remote Desktop Protocol Security Feature Bypass

State: Published
Severity: 7.0 High
Published: Oct 14, 2025
Updated: Feb 22, 2026
Reserved: Aug 12, 2025

Description

Improper authentication in Windows Remote Desktop Protocol allows an authorized attacker to bypass a security feature locally.

Scores

CVSS	Score	Vector	Source
3.1	7.0 High	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-287 Improper Authentication

Affected Products

Product	Versions
Windows 10 Version 21H2Microsoft	10.0.19044.0 to before 10.0.19044.6456Affected
Windows 10 Version 22H2Microsoft	10.0.19045.0 to before 10.0.19045.6456Affected
Windows 11 version 22H2Microsoft	10.0.22621.0 to before 10.0.22621.6060Affected
Windows 11 version 22H3Microsoft	10.0.22631.0 to before 10.0.22631.6060Affected
Windows 11 Version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.6060Affected
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.6899Affected
Windows 11 Version 25H2Microsoft	10.0.26200.0 to before 10.0.26200.6899Affected
Windows Server 2022Microsoft	10.0.20348.0 to before 10.0.20348.4294Affected
Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft	10.0.25398.0 to before 10.0.25398.1913Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.6899Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.6899Affected

References

Windows Remote Desktop Protocol Security Feature Bypassvendor-advisorypatch

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.