CVE-2020-1147
Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint, and Visual Studio when the software fails to check the source markup of XML file input, aka '.NET Framework, SharePoint Server, and Visual Studio Remote Code Execution Vulnerability'.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 95.80% probability · 100th percentile
- Public exploits
- 2 in Exploit-DB · first 17 August 2020
- CISA KEV
- Listed 3 November 2021 · due 3 May 2022
- Affected
- microsoft/.net core · microsoft/.net framework · microsoft/sharepoint enterprise server · microsoft/sharepoint server · microsoft/visual studio 2017 · microsoft/visual studio 2019
- Source
- secure@microsoft.com
EPSS moved from 95.8% on 29 October 2026 to 95.8% on 30 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2020-1147
Public exploits (2)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/158694/SharePoint-DataSet-DataTable-Deserialization.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/158876/Microsoft-SharePoint-Server-2019-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/163644/Microsoft-SharePoint-Server-2019-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1147Patch, Vendor Advisory
- https://www.exploitalert.com/view-details.html?id=35992Exploit, Third Party Advisory
- http://packetstormsecurity.com/files/158694/SharePoint-DataSet-DataTable-Deserialization.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/158876/Microsoft-SharePoint-Server-2019-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/163644/Microsoft-SharePoint-Server-2019-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1147Patch, Vendor Advisory
- https://www.exploitalert.com/view-details.html?id=35992Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1147US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.