Denial of Service Vulnerability in Windows Local Session Manager by Microsoft
CVE-2025-26651

6.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Windows Server 2022
Windows 11 Version 22h2
Windows Server 2025 (server Core Installation)
Windows 11 Version 22h3
Vendor
CVE Published:
8 April 2025

What is CVE-2025-26651?

A denial of service vulnerability exists in the Windows Local Session Manager, which could allow an authorized attacker to exploit exposed harmful functions. This could lead to a disruption in service, potentially affecting system availability over the network. Organizations should implement mitigations and ensure their systems are updated to mitigate risks associated with this vulnerability.

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Affected Version(s)

Windows 11 version 22H2 ARM64-based Systems 10.0.22621.0 < 10.0.22621.5189

Windows 11 version 22H3 ARM64-based Systems 10.0.22631.0 < 10.0.22631.5189

Windows 11 Version 23H2 x64-based Systems 10.0.22631.0 < 10.0.22631.5189

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

EPSS Score

30% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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