Microsoft .NET Framework 4.0 (CLR version 4.0.30319) is a legacy runtime environment that has reached its official End of Support (EOS)
If you see this in an environment, expect: microsoft net framework 4.0 v 30319 vulnerabilities
A flaw in the ASP.NET subsystem allows remote authenticated users to gain access to other user accounts via specially crafted usernames. Microsoft
A: No. Extended support ended January 12, 2021. No new security patches are released. microsoft net framework 4.0 v 30319 vulnerabilities