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Critical · 9.8 Known exploited Public exploit CVE-2020-0646 EUVD-2020-2140GHSA-4w3v-83v8-mg94

A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote…

Published Jan 14, 2020 · Updated Oct 21, 2025 · Assigned by microsoft

Vendor: Microsoft Product: Microsoft .NET Framework 3.0 Product: Microsoft .NET Framework 3.5 Product: 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 Product: Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 Product: Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems Product: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for 32-bit Systems Product: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for x64-based Systems Product: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems Product: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems Product: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems Product: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems Product: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 Product: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation) Product: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation) Product: Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems Product: Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems Product: Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems Product: Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems Product: Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit Systems Product: Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based Systems Product: Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 Product: Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation) Product: Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation) Product: Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation) Product: Microsoft .NET Framework 3.5.1 Product: Microsoft .NET Framework 4.5.2 Product: Microsoft .NET Framework 4.6 Product: Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 Product: Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems Product: Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1 Product: Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1 Product: Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems Product: Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems Product: Microsoft .NET Framework 4.8 on Windows RT 8.1 Product: Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Product: Microsoft .NET Framework 4.8 on Windows Server 2012 Product: Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) Product: Microsoft .NET Framework 4.8 on Windows Server 2012 R2 Product: Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) Product: Microsoft .NET Framework 4.8 on Windows Server 2016 Product: Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) Product: Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation) Platform: Windows

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'.

Affected products

VendorProductAffectedFixed
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 (S… —
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 .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation) unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows RT 8.1 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation) 1903 —
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation) unspecified —
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 .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 .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 .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 install… —
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 Se… —
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation) unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems unspecified —
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 .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 .NET Framework 3.5 AND 4.7.2 on Windows 10 for x64-based Systems unspecified —
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 .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems unspecified —
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 .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 unspecified —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Metasploit 1 module

Exploit-DB 1

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References