CVE-2014-4121: Microsoft .NET Framework

High severity, CVSS 10.0. EPSS: 19.2% 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, and 4.5.2 does not properly parse internationalized resource identifiers, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted request to a .NET web application, aka ".NET Framework Remote Code Execution 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 2014-10-15. Last modified 2026-06-17.