CVE-2020-0646
9.8
CRITICAL
CVSS 3.1
EPSS 99.2% · 100th pctCISA KEV · Exploited in the wild
2020-01-14Updated 2025-10-21KEV 2021-11-03
CISA Known Exploited Vulnerabilities
Microsoft .NET Framework Remote Code Execution Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Added to KEV
2021-11-03
Remediation due
2022-05-03
Required action
Apply updates per vendor instructions.
CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2020-0646
Description
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
Severity
CVSS 3.1 · CISA9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSSVC · CISA-ADP
Exploitationactive
Automatableyes
Technical impacttotal
Exploitation Context
as of October 13, 2026- CISA added CVE-2020-0646 to the KEV catalog 659 days after its CVE record was published.
- It is one of 390 Microsoft entries in the CISA KEV catalog, and one of 83 added in 2021.
- Its current EPSS score (99.2%) is higher than that of 87% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows 7 for 32-bit Systems Service Pack 1 Windows 7 for x64-based Systems Service Pack 1 Windows 8.1 for 32-bit systems Windows 8.1 for x64-based systems Windows RT 8.1 Windows Server 2008 R2 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Windows Server 2012 Windows Server 2012 (Server Core installation) Windows Server 2012 R2 Windows Server 2012 R2 (Server Core installation) |
| Microsoft | Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 | Windows 10 Version 1607 for 32-bit Systems |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation) | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1 | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1 | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows RT 8.1 | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2 | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation) | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation) | 1903 |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation) | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 4.6 | Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for x64-based Systems Service Pack 2 |
| Microsoft | Microsoft Microsoft .NET Framework 3.0 | Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 | Windows 10 Version 1607 for 32-bit Systems Windows 8.1 for 32-bit systems Windows 8.1 for x64-based systems Windows Server 2012 Windows Server 2012 (Server Core installation) Windows Server 2012 R2 Windows Server 2012 R2 (Server Core installation) |
| Microsoft | Microsoft Microsoft .NET Framework 3.5.1 | Windows 7 for 32-bit Systems Service Pack 1 Windows 7 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 Windows Server 2008 R2 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |
| Microsoft | Microsoft Microsoft .NET Framework 4.5.2 | Windows 7 for 32-bit Systems Service Pack 1 Windows 7 for x64-based Systems Service Pack 1 Windows 8.1 for 32-bit systems Windows 8.1 for x64-based systems Windows RT 8.1 Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for x64-based Systems Service Pack 2 Windows Server 2008 R2 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Windows Server 2012 Windows Server 2012 (Server Core installation) Windows Server 2012 R2 Windows Server 2012 R2 (Server Core installation) |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation) | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation) | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for 32-bit Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation) | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for x64-based Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems | unspecified |
| Microsoft | Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 | unspecified |
References
2 LinksRecord Details
Published
2020-01-14
Last updated
2025-10-21
Assigner (CNA)
microsoft
Credited to
-
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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.