CVE-2019-0820

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

A denial of service vulnerability exists when .NET Framework and .NET Core improperly process RegEx strings, aka '.NET Framework and .NET Core Denial of Service Vulnerability'. This CVE ID is unique from CVE-2019-0980, CVE-2019-0981.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400

Affected software

VendorProductVersions
MicrosoftMicrosoft .NET Framework 4.5.2Windows 7 for 32-bit Systems Service Pack 1; Windows 7 for x64-based Systems Service Pack 1; Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation); Windows Server 2008 R2 for x64-based Systems Service Pack 1; Windows Server 2012; Windows Server 2012 (Server Core installation); Windows 8.1 for 32-bit systems; Windows 8.1 for x64-based systems; Windows Server 2012 R2; Windows RT 8.1; Windows Server 2012 R2 (Server Core installation); Windows Server 2008 for 32-bit Systems Service Pack 2; Windows Server 2008 for x64-based Systems Service Pack 2
MicrosoftMicrosoft .NET Framework 4.6Windows Server 2008 for 32-bit Systems Service Pack 2; Windows Server 2008 for x64-based Systems Service Pack 2
Microsoft.NET Core1; 1.1; 2.1; 2.2
MicrosoftMicrosoft .NET Framework 4.7.2Windows 10 Version 1803 for 32-bit Systems; Windows 10 Version 1803 for x64-based Systems; Windows Server, version 1803 (Server Core Installation); Windows 10 Version 1803 for ARM64-based Systems; Windows Server 2019; Windows Server 2019 (Server Core installation)
MicrosoftMicrosoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2Windows 7 for 32-bit Systems Service Pack 1; Windows 7 for x64-based Systems Service Pack 1; Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation); Windows Server 2008 R2 for x64-based Systems Service Pack 1; Windows Server 2012; Windows Server 2012 (Server Core installation); Windows 8.1 for 32-bit systems; Windows 8.1 for x64-based systems; Windows Server 2012 R2; Windows RT 8.1; Windows Server 2012 R2 (Server Core installation)
MicrosoftMicrosoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2Windows Server 2016; Windows Server 2016 (Server Core installation)
MicrosoftMicrosoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2012unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 8.1 for 32-bit systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 8.1 for x64-based systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2012 R2unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows RT 8.1unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation)unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2016unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation)unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1703 for 32-bit Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1703 for x64-based Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation)unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1809 for 32-bit Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1809 for x64-based Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2019unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2019 (Server Core installation)unspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1903 for 32-bit Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1903 for x64-based Systemsunspecified
MicrosoftMicrosoft .NET Framework 4.8 on Windows Server, version 1903 (Server Core installation)unspecified
MicrosoftMicrosoft .NET Framework 3.5Windows Server 2012; Windows Server 2012 (Server Core installation); Windows 8.1 for 32-bit systems; Windows 8.1 for x64-based systems; Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); Windows 10 for 32-bit Systems; Windows 10 for x64-based Systems; Windows Server 2016; Windows 10 Version 1607 for 32-bit Systems; Windows 10 Version 1607 for x64-based Systems; Windows Server 2016 (Server Core installation); Windows 10 Version 1703 for 32-bit Systems; Windows 10 Version 1703 for x64-based Systems; Windows 10 Version 1709 for 32-bit Systems; Windows 10 Version 1709 for x64-based Systems; Windows 10 Version 1803 for 32-bit Systems; Windows 10 Version 1803 for x64-based Systems; Windows Server, version 1803 (Server Core Installation); Windows 10 Version 1803 for ARM64-based Systems
MicrosoftMicrosoft .NET Framework 3.5 on Windows 10 Version 1903 for 32-bit Systemsunspecified
MicrosoftMicrosoft .NET Framework 3.5 on Windows 10 Version 1903 for x64-based Systemsunspecified
MicrosoftMicrosoft .NET Framework 3.5 on Windows Server, version 1903 (Server Core installation)unspecified
MicrosoftMicrosoft .NET Framework 3.0Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2; Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2; Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
MicrosoftMicrosoft .NET Framework 2.0Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2; Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2; Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
MicrosoftMicrosoft .NET Framework 3.5.1Windows 7 for 32-bit Systems Service Pack 1; Windows 7 for x64-based Systems Service Pack 1; Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation); Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1; Windows Server 2008 R2 for x64-based Systems Service Pack 1

References

Timeline

Published
May 16, 2019
Last modified
Jun 17, 2026
NVD status
Modified

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