CVE-2025-26651

Windows Local Session Manager (LSM) Denial of Service Vulnerability

State: Published
Severity: 6.5 Medium
Published: Apr 8, 2025
Updated: Aug 10, 2026
Reserved: Feb 12, 2025

Description

Exposed dangerous method or function in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-749 Exposed Dangerous Method or Function

Affected Products

Product	Versions
Windows 11 version 22H2Microsoft	10.0.22621.0 to before 10.0.22621.5189Affected
Windows 11 version 22H3Microsoft	10.0.22631.0 to before 10.0.22631.5189Affected
Windows 11 Version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.5189Affected
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.3775Affected
Windows Server 2022Microsoft	10.0.20348.0 to before 10.0.20348.3453Affected
Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft	10.0.25398.0 to before 10.0.25398.1551Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.3775Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.3775Affected

References

Windows Local Session Manager (LSM) Denial of Service Vulnerabilityvendor-advisorypatch

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