CVE-2018-8540: Microsoft .NET Framework

Critical severity, CVSS 9.8. EPSS: 21.6% chance of exploitation in the next 30 days.

A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka ".NET Framework Remote Code Injection Vulnerability." This affects Microsoft .NET Framework 4.6, Microsoft .NET Framework 3.5, Microsoft .NET Framework 4.7/4.7.1/4.7.2, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2, Microsoft .NET Framework 4.5.2, Microsoft .NET Framework 4.7.1/4.7.2, Microsoft .NET Framework 4.7.2, Microsoft .NET Framework 4.6.2.

Affected products

• Microsoft .NET Framework: version 3.5 only; version 3.5.1 only; version 4.5.2 only; version 4.6.2 only; version 4.6 only; version 4.6.1 only; …

Published 2018-12-12. Last modified 2026-06-17.