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CVE-2020-0646: Microsoft .NET Framework Remote Code Execution Vulnerability

criticalknown exploitedpublic exploitCVE-2020-0646
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 contains an improper input validation vulnerability that allows for remote code execution.

CSIRTS triage

vendor: Microsoftproduct: .NET FrameworkRemote code execution
What
Microsoft .NET Framework contains an improper input validation vulnerability that allows for remote code execution.
Who is affected
Deployments of Microsoft .NET Framework.
Urgency
Remediation is urgent as the vulnerability is actively exploited and is rated critical.
Action
Install the latest security updates from Microsoft.

AI-assisted analysis generated from the source advisory — verify against the original.

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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-2020-0646

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-2020-0646coverage & 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.

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