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Unrated severityNVD Advisory· Published Oct 14, 2025· Updated Feb 22, 2026

Windows Local Session Manager (LSM) Denial of Service Vulnerability

CVE-2025-59257

Description

Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.

Affected products

5
  • Microsoft/Windows 11 Version 24H2v5
    Range: 10.0.26100.0
  • Microsoft/Windows 11 Version 25H2v5
    Range: 10.0.26200.0
  • Microsoft/Windows Server 2022, 23H2 Edition (Server Core installation)v5
    Range: 10.0.25398.0
  • Microsoft/Windows Server 2025v5
    Range: 10.0.26100.0
  • Microsoft/Windows Server 2025 (Server Core installation)v5
    Range: 10.0.26100.0

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

1

News mentions

0

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