CVE-2020-0646

.NET Framework Remote Code Execution Injection Vulnerability

CVE-2020-0646 is fixed in 87 products on 1 platform, first by KB4534271, released January 14, 2020. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021. Patch Radar priority: Patch now.

Patch nowCISA KEV
CVSS
n/a
Critical
Exploitation
Exploited
Listed by CISA
CISA KEV
Nov 3, 2021
Federal due date May 3, 2022
EPSS
0.9922
99th percentile

<p>A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly. An attacker who successfully exploited this vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.</p> <p>To exploit the vulnerability, an attacker would need to pass specific input to an application utilizing susceptible .Net methods.</p> <p>The security update addresses the vulnerability by correcting how the Microsoft .NET Framework validates input.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 KB4535105 Jan 14, 2020
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 KB4534979 Jan 14, 2020
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 KB4535105 Jan 14, 2020
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 KB4534979 Jan 14, 2020
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 KB4535105 Jan 14, 2020
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 KB4534979 Jan 14, 2020
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 14393.3443 KB4534271 Jan 14, 2020
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 14393.3443 KB4534271 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 14393.3443 KB4534271 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation) 14393.3443 KB4534271 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.6/4.6.1/4.6.2 on Windows 10 for 32-bit Systems 10240.18453 KB4534306 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.6/4.6.1/4.6.2 on Windows 10 for x64-based Systems 10240.18453 KB4534306 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems 16299.1625 KB4534276 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems 16299.1625 KB4534276 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems 17134.1246 KB4534293 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems 17134.1246 KB4534293 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems KB4535101 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems KB4535101 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 KB4535101 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation) KB4535101 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation) 17134.1246 KB4534293 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems KB4535101 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems KB4535101 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems KB4532938 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems KB4532938 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit Systems KB4532938 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based Systems KB4532938 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 KB4535101 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation) KB4535101 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation) KB4532938 Jan 14, 2020
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation) KB4532938 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems 14393.3443 KB4534271 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems KB4535104 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems KB4534978 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems KB4535104 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems KB4534978 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows Server 2012 KB4535103 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows Server 2012 KB4534977 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) KB4535103 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) KB4534977 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 KB4535104 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 KB4534978 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) KB4535104 Jan 14, 2020
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) KB4534978 Jan 14, 2020
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4535102 Jan 14, 2020
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows 7 for x64-based Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows 7 for x64-based Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit systems KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit systems KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based systems KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based systems KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows RT 8.1 KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 KB4535105 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 KB4534979 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2008 for x64-based Systems Service Pack 2 KB4535105 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2008 for x64-based Systems Service Pack 2 KB4534979 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2012 KB4535103 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2012 KB4534977 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation) KB4535103 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation) KB4534977 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 (Server Core installation) KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 (Server Core installation) KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2 KB4535105 Jan 14, 2020
Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2 KB4534979 Jan 14, 2020
Microsoft .NET Framework 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2 KB4535105 Jan 14, 2020
Microsoft .NET Framework 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2 KB4534979 Jan 14, 2020
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems 14393.3443 KB4534271 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for x64-based Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for x64-based Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for 32-bit systems KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for 32-bit systems KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for x64-based systems KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for x64-based systems KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows RT 8.1 KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 KB4535103 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 KB4534977 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation) KB4535103 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation) KB4534977 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation) KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation) KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems KB4532933 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems KB4532933 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems KB4532935 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems KB4532935 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems KB4532936 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems KB4532936 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows RT 8.1 KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4535102 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4534976 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2012 KB4535103 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2012 KB4534977 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) KB4535103 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) KB4534977 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2012 R2 KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2012 R2 KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) KB4535104 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) KB4534978 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2016 KB4532933 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) KB4532933 Jan 14, 2020
Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation) KB4532936 Jan 14, 2020

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