CVE-2013-3134: Microsoft .NET Framework

High severity, CVSS 9.3. EPSS: 21% chance of exploitation in the next 30 days.

The Common Language Runtime (CLR) in Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, and 4.5 on 64-bit platforms does not properly allocate arrays of structures, which allows remote attackers to execute arbitrary code via a crafted .NET Framework application that changes array data, aka "Array Allocation 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

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