CVE-2015-2504: Microsoft .NET Framework

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

Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, 4.5.2, and 4.6 improperly counts objects before performing an array copy, which allows remote attackers to (1) execute arbitrary code via a crafted XAML browser application (XBAP) or (2) bypass Code Access Security restrictions via a crafted .NET Framework application, aka ".NET Elevation of Privilege 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; version 4.5.1 only; …

Published 2015-09-09. Last modified 2026-06-17.