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

CVE-2020-0646 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03

A remote code execution vulnerability exists in Microsoft .NET Framework due to improper input validation, specifically involving XOML injection. An attacker can exploit this to execute arbitrary code on a target system without user interaction.

Technologies: Microsoft .NET Framework. Vendors: Microsoft.

Quick answers

Is CVE-2020-0646 exploited in the wild?
Yes. CVE-2020-0646 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2020-0646?
Critical severity, with a CVSS score of 9.8, published 3 November 2021.
Which products and versions are affected?
Microsoft .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8.
Is there a fix for CVE-2020-0646?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2020-0646 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2020-0646?
Check whether you run Microsoft .NET Framework. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Microsoft .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8

Timeline

  • 2020-02-11: disclosed: Initial release date of the vulnerability advisory by Microsoft.
  • 2021-11-03: kev added: Added to CISA's Known Exploited Vulnerabilities Catalog.
  • 2021-11-03: disclosed: NVD publication date.

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