Security readout for executives and security teams
CVE-2020-0646 is a critical Microsoft .NET Framework remote code execution flaw caused by improper input validation. If an exposed affected system processes hostile input, an attacker may run code remotely. CISA lists it in KEV, so treat it as known exploited, not theoretical. Exposure is most likely on Windows systems running the listed affected .NET Framework versions, including Windows 7, 8.1, RT 8.1, Windows Server 2008 R2, 2012, 2012 R2, Server 2016, and Windows 10 1607, 1709, or 1803 variants. Make this an urgent remediation item for legacy and exposed Windows estates. The combination of critical severity, remote code execution, no required authentication or user interaction, and CISA KEV status creates material business risk if affected systems remain unpatched. Mitigation focus: Apply the applicable Microsoft security updates from the MSRC advisory.; Prioritize remediation under KEV-driven vulnerability management timelines.; Inventory affected Windows and .NET Framework versions across servers and workstations..
Michael Williams reviewed this cited source version on .
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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CISA KEV status
CVSS vector scores
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CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0646CVE reference · government-resource
Products and packages named in the record
CWE details
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