X-aspnet-version 4.0.3 Vulnerabilities Jun 2026

Exposing the version number is not a vulnerability per se , but it signals the presence of a known-weak platform. Below are critical vulnerabilities affecting .NET 4.0.3 (unpatched unless migrated to 4.5+).

<system.web> <httpRuntime enableVersionHeader="false" /> </system.web> x-aspnet-version 4.0.3 vulnerabilities

Regularly perform security audits and vulnerability assessments to identify and address potential weaknesses. Exposing the version number is not a vulnerability