High MSRC-CVE-2025-26651 1 CVE

Windows Local Session Manager (LSM) Denial of Service Vulnerability

Published Apr 8, 2025 · Updated Apr 8, 2025

Vendor: Microsoft

Summary

Impact: Denial of Service. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

Security updates
10.0.20348.3453 — https://support.microsoft.com/help/5055526
10.0.22621.5189 — https://support.microsoft.com/help/5055528
10.0.26100.3775 — https://support.microsoft.com/help/5055523
10.0.25398.1551 — https://support.microsoft.com/help/5055527

Vulnerabilities 1

Medium 6.5

CVE-2025-26651

Windows Local Session Manager (LSM) Denial of Service Vulnerability

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

Microsoft Windows Server 2022 Windows Server 2025 Windows Server 2025 (Server Core installation) Windows

Apr 8, 2025

Revision history

2025-04-08 #1
Information published.

References

CVE-2025-26651 Windows Local Session Manager (LSM) Denial of Service Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26651
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss