CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2020-1147: Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerability

criticalknown exploitedpublic exploitCVE-2020-1147
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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

vendor: Microsoftproduct: .NET Framework, SharePoint, and Visual StudioRemote code execution
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.

⚡ Watch .NET Framework, SharePoint, and Visual Studio

Get an email when a new .NET Framework, SharePoint, and Visual Studio advisory drops — max one per day, one-click unsubscribe.

Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-1147

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2020-1147coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft .NET Framework

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CISA Known Exploited Vulnerabilities