CVE-2020-1147
Actively exploited. CVE-2020-1147 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2020-1147 is indexed in Metasploit and Exploit-DB. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
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.
CSIRTS triage
- What
- These Microsoft products contain a remote code execution vulnerability due to improper XML input validation.
- Who is affected
- Users of Microsoft .NET Framework, SharePoint, and Visual Studio.
- Urgency
- Remediation is urgent due to the critical nature of the vulnerability and confirmed exploitation.
- Action
- Install the latest security updates from Microsoft.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2020-1147 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- MetasploitA Metasploit Framework module targets this CVE — weaponized, point-and-click exploitation.look it up ↗
- Exploit-DBA public exploit is published in the Exploit-DB archive.look it up ↗
Advisory coverage (1)
- criticalexploitedCVE-2020-1147: Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerabilitycisa-kev · 2021-11-03
External references
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