CVE-2010-2551: Microsoft Windows 7

High severity, CVSS 7.8. EPSS: 66.6% chance of exploitation in the next 30 days.

The SMB Server in Microsoft Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 does not properly validate an internal variable in an SMB packet, which allows remote attackers to cause a denial of service (system hang) via a crafted (1) SMBv1 or (2) SMBv2 packet, aka "SMB Variable Validation Vulnerability."

Affected products

• Microsoft Windows 7: any version; affected versions not specified
• Microsoft Windows Server 2008: any version; affected versions not specified
• Microsoft Windows Vista: any version; affected versions not specified

Published 2010-08-11. Last modified 2026-06-16.