Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerability (CVE-2020-1147)
Severity: high · Patch status: patched · Since 2021-11-03 · CVE-2020-1147
Microsoft .NET Framework, Microsoft SharePoint, and Visual Studio contain a remote code execution vulnerability when the software fails to check the source markup of XML file input. Successful exploitation allows an attacker to execute code in the context of the process responsible for deserialization of the XML content. CISA added CVE-2020-1147 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means attackers are exploiting it in the wild.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by May 3, 2022 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
