November 3, 2021 · Applied Cybernetics Group
CVE-2020-1147 — Microsoft .NET Framework, SharePoint, Visual Studio
Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerability
- Added to KEV
2021-11-03- Federal due date
2022-05-03- Vendor
- Microsoft
- Product
- .NET Framework, SharePoint, Visual Studio
- EPSS
- 99.8th percentile (score 0.934, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2020-1147
CISA short description
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.
Required action
Apply updates per vendor instructions.