Microsoft Net Framework 4.0 V 30319 Vulnerabilities 'link'

If you see 4.0.30319 in a production environment today, it is to all patched .NET Framework issues from 2016 onward.

ClickOnce deployment in .NET 4.0.30319 did not enforce HTTPS for manifest downloads correctly. An attacker on the same local network (or via ARP spoofing) could replace a legitimate .application manifest with a malicious one. The .NET Framework would trust the manifest if the signature was still valid—even if the content changed. microsoft net framework 4.0 v 30319 vulnerabilities

parameter, which can lead to unauthorized remote code execution. Stack Overflow Important Distinction: CLR vs. Framework Version If you see 4

This vulnerability resides in the ISymUnmanagedReader interface used by the .NET Framework to parse debugging symbols from WSDL (Web Services Description Language). An attacker can craft a malicious SOAP endpoint. When a .NET 4.0 application attempts to consume this WSDL, the parser executes arbitrary code. the parser executes arbitrary code.