CVE-2025-26651

Windows Local Session Manager (LSM) Denial of Service Vulnerability

CVE-2025-26651 is fixed in 11 products on 1 platform, first by KB5055528, released April 8, 2025. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

6.5

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0261

85th percentile

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

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 11 Version 22H2 for ARM64-based Systems		KB5055528	Apr 8, 2025
Windows 11 Version 22H2 for x64-based Systems		KB5055528	Apr 8, 2025
Windows 11 Version 23H2 for ARM64-based Systems		KB5055528	Apr 8, 2025
Windows 11 Version 23H2 for x64-based Systems		KB5055528	Apr 8, 2025
Windows 11 Version 24H2 for ARM64-based Systems	26100.3775	KB5055523	Apr 8, 2025
Windows 11 Version 24H2 for x64-based Systems	26100.3775	KB5055523	Apr 8, 2025
Windows Server 2022	20348.3453	KB5055526	Apr 8, 2025
Windows Server 2022 (Server Core installation)	20348.3453	KB5055526	Apr 8, 2025
Windows Server 2022, 23H2 Edition (Server Core installation)	25398.1551	KB5055527	Apr 8, 2025
Windows Server 2025	26100.3775	KB5055523	Apr 8, 2025
Windows Server 2025 (Server Core installation)	26100.3775	KB5055523	Apr 8, 2025

Details

Published
April 8, 2025
Weakness
Exposed Dangerous Method or Function
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26651

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2025-26651">CVE-2025-26651 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.