CVE-2011-3416: Microsoft Windows 7

High severity, CVSS 8.5. EPSS: 43.7% chance of exploitation in the next 30 days.

The Forms Authentication feature in the ASP.NET subsystem in Microsoft .NET Framework 1.1 SP1, 2.0 SP2, 3.5 SP1, 3.5.1, and 4.0 allows remote authenticated users to obtain access to arbitrary user accounts via a crafted username, aka "ASP.Net Forms Authentication Bypass Vulnerability."

Affected products

• Microsoft Windows 7: affected versions not specified
• Microsoft Windows Server 2003: any version
• Microsoft Windows Server 2008: any version; affected versions not specified; version r2 only
• Microsoft Windows Vista: any version; affected versions not specified
• Microsoft Windows XP: any version; version sp3 only

Published 2011-12-30. Last modified 2026-06-16.