!free! - X-aspnet-version 4.0.3 Vulnerabilities

Response.Headers.Remove("X-AspNet-Version");

.NET 4.0.3 reached end-of-life on July 9, 2019 . No security updates are issued by Microsoft. x-aspnet-version 4.0.3 vulnerabilities

There have been vulnerabilities in ASP.NET that could allow for remote code execution. While specifics can vary by version and patch level, an RCE vulnerability would allow an attacker to execute arbitrary code on the server, potentially leading to full control over the server. Response

Leverage built-in .NET security features and libraries to enhance application security. x-aspnet-version 4.0.3 vulnerabilities

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+).