CVE-2025-26651

Windows Local Session Manager (LSM) Denial of Service Vulnerability

Description

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

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 13.19% Top 10%
Vendor Advisory microsoft.com
Affected: Microsoft Windows Server 2022
Affected: Microsoft Windows 11 version 22H2
Affected: Microsoft Windows Server 2025 (Server Core installation)
Affected: Microsoft Windows 11 version 22H3
Affected: Microsoft Windows 11 Version 23H2
Affected: Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
Affected: Microsoft Windows 11 Version 24H2
Affected: Microsoft Windows Server 2025
Published at:
Updated at:

References

Link Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26651 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-26651?
CVE-2025-26651 has been scored as a medium severity vulnerability.
How to fix CVE-2025-26651?
To fix CVE-2025-26651, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-26651 being actively exploited in the wild?
It is possible that CVE-2025-26651 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~13% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-26651?
CVE-2025-26651 affects Microsoft Windows Server 2022, Microsoft Windows 11 version 22H2, Microsoft Windows Server 2025 (Server Core installation), Microsoft Windows 11 version 22H3, Microsoft Windows 11 Version 23H2, Microsoft Windows Server 2022, 23H2 Edition (Server Core installation), Microsoft Windows 11 Version 24H2, Microsoft Windows Server 2025.
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