CVE-2025-21313: Windows Security Account Manager (SAM) Denial of Service Vulnerability

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

Category

Denial of Service

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2025-Jan

Released

2025-01-14

EPSS Score

0.94% (percentile: 76.2%)

FAQ

How could an attacker exploit the vulnerability? An authenticated attacker could make specially crafted API calls that lead to a Denial of Service.

Affected Products (5)

Windows

• Windows Server 2025 (Server Core installation)
• Windows Server 2022, 23H2 Edition (Server Core installation)
• Windows 11 Version 24H2 for ARM64-based Systems
• Windows 11 Version 24H2 for x64-based Systems
• Windows Server 2025

Security Updates (2)

• 5050009
• 5049984

Acknowledgments

Internal with Microsoft

Revision History

• 2025-01-14: Information published.