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CVE Number Vulnerability Product Severity Date
CVE-2018-8421 .NET Framework Remote Code Execution Vulnerability Microsoft .NET Framework Critical 12-09-2018

Technical Information

Brief overview of the risk:
A remote code execution vulnerability exists when Microsoft .NET Framework processes untrusted input. An attacker who successfully exploited this vulnerability in software using the .NET framework could take control of an affected system.

Detailed Information on the risk:
To exploit the vulnerability, an attacker would first need to convince the user to open a malicious document or application.
The security update addresses the vulnerability by correcting how .NET validates untrusted input.

Further information on this exploit is available at : CVE-2018-8421

Affected Software


Microsoft .NET Framework 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1,
Microsoft .NET Framework 4.5.2 on Windows 7 for x64-based Systems Service Pack 1,
Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation),
Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1,
Microsoft .NET Framework 4.5.2 on Windows Server 2012,
Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation),
Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit systems,
Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based systems,
Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2,
Microsoft .NET Framework 4.5.2 on Windows RT 8.1,
Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 (Server Core installation),
Microsoft .NET Framework 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2,
Microsoft .NET Framework 4.5.2 on Windows Server 2008 for x64-based Systems Service Pack 2,
Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2,
Microsoft .NET Framework 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2,
Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for 32-bit Systems,
Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for x64-based Systems,
Microsoft .NET Framework 4.7.2 on Windows Server, version 1803 (Server Core Installation),
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1,
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows 7 for x64-based Systems Service Pack 1,
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation),
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1,
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2012,
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation),
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows 8.1 for 32-bit systems,
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows 8.1 for x64-based systems,
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2012 R2,
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows RT 8.1,
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation),
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016,
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems,
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems,
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation),
Microsoft .NET Framework 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for 32-bit Systems,
Microsoft .NET Framework 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for x64-based Systems,
Microsoft .NET Framework 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems,
Microsoft .NET Framework 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems,
Microsoft .NET Framework 4.7.1/4.7.2 on Windows Server, version 1709 (Server Core Installation),
Microsoft .NET Framework 3.5 on Windows Server 2012,
Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation),
Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems,
Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems,
Microsoft .NET Framework 3.5 on Windows Server 2012 R2,
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation),
Microsoft .NET Framework 3.5 on Windows 10 for 32-bit Systems,
Microsoft .NET Framework 3.5 on Windows 10 for x64-based Systems,
Microsoft .NET Framework 3.5 on Windows Server 2016,
Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems,
Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for x64-based Systems,
Microsoft .NET Framework 3.5 on Windows Server 2016 (Server Core installation),
Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for 32-bit Systems,
Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for x64-based Systems,
Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for 32-bit Systems,
Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for x64-based Systems,
Microsoft .NET Framework 3.5 on Windows Server, version 1709 (Server Core Installation),
Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for 32-bit Systems,
Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for x64-based Systems,
Microsoft .NET Framework 3.5 on Windows Server, version 1803 (Server Core Installation),
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2,
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2,
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2,
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2,
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2,
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2,
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1,
Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1,
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation),
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1,
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1