CVE-2013-3131: Microsoft .NET Framework

High severity, CVSS 9.3. EPSS: 22% chance of exploitation in the next 30 days.

Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, and 4.5, and Silverlight 5 before 5.1.20513.0, does not properly prevent changes to data in multidimensional arrays of structures, which allows remote attackers to execute arbitrary code via (1) a crafted .NET Framework application or (2) a crafted Silverlight application, aka "Array Access Violation Vulnerability."

Affected products

• Microsoft .NET Framework: version 2.0 only; version 3.5 only; version 3.5.1 only; version 4.0 only; version 4.5 only
• Microsoft Silverlight: version 5.0.60401.0 only; version 5.0.60818.0 only; version 5.0.61118.0 only; version 5.1.10411.0 only; version 5.1.20125.0 only

Published 2013-07-10. Last modified 2026-06-16.