CVE-2020-0646 Microsoft .NET Framework Remote Code Execution

What is CVE-2020-0646?

CVE-2020-0646 is a critical code injection vulnerability in Microsoft .Net Framework, published on 14 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.

Weakness: CWE-91

Which versions are affected by CVE-2020-0646?

It affects 1 product.

Products include Microsoft .Net Framework.

How do I fix CVE-2020-0646?

No fix has been published for CVE-2020-0646 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 May 2022.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2020-0646 being exploited?

Yes. Attackers have exploited CVE-2020-0646 in the wild since at least 3 Nov 2021.

Public exploit code: 1 Metasploit module and 1 Exploit-DB entry.

Other vulnerabilities in Microsoft .Net Framework

• CVE-2017-8759 Microsoft .NET Framework Remote Code Execution Exploited High 7.8
• CVE-2015-1671 Microsoft Windows Remote Code Execution Exploited High 7.8
• CVE-2024-29059 Microsoft .NET Framework Information Disclosure Exploited High 7.5
• CVE-2014-4073 Privilege escalation in n/a Critical 10.0
• CVE-2014-4121 Memory corruption in n/a Critical 10.0

All Microsoft .Net Framework vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-4w3v-83v8-mg94.