CVE-2019-0657

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-03-06 · updated 2026-06-17
Weakness: CWE-20

Description

A vulnerability exists in certain .Net Framework API's and Visual Studio in the way they parse URL's, aka '.NET Framework and Visual Studio Spoofing Vulnerability'.

Affected products

Microsoft Corporation .NET Core: 1.0, 2.1, 2.2
Microsoft .NET Framework: 2.0-sp2, 3.0-sp2, 3.5, 3.5.1, 4.5.2, 4.6 (+5)
Microsoft PowerShell Core: 6.0, 6.1
Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8): 15.9
Microsoft Corporation .NET Core: 1, 2.1, 2.2
Microsoft .NET Framework 2.0: 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 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
Microsoft .NET Framework 3.5: 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 Server 2012 R2 (Server Core installation) (+19)
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 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
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 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) (+7)
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 .NET Framework 4.6.2/4.7/4.7.1/4.7.2: 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)
Microsoft .NET Framework 4.6/4.6.1/4.6.2: Windows 10 for 32-bit Systems, Windows 10 for x64-based Systems
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 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) (+5)
Microsoft .NET Framework 4.7.1/4.7.2: Windows 10 Version 1709 for 32-bit Systems, Windows 10 Version 1709 for x64-based Systems, Windows Server, version 1709 (Server Core Installation), Windows 10 Version 1709 for ARM64-based Systems
Microsoft .NET Framework 4.7.2: 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, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems (+2)
Microsoft .NET Framework 4.7/4.7.1/4.7.2: Windows 10 Version 1703 for 32-bit Systems, Windows 10 Version 1703 for x64-based Systems
Microsoft PowerShell Core: 6.1, 6.2
Microsoft Visual Studio: 2017
Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8): version 15.9

References

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