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CVE-2022-34716: .NET Spoofing Vulnerability

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-08-09 · updated 2026-06-17
• Weakness: CWE-290

Description

.NET Spoofing Vulnerability

Affected products

• Microsoft .NET: from 6.0.0 before 6.0.8 — fixed in 6.0.8
• Microsoft Corporation .NET Core: from 3.1 before 3.1.28 — fixed in 3.1.28
• Microsoft Powershell: from 7.0 before 7.0.12; from 7.2 before 7.2.6 — fixed in 7.0.12, 7.2.6
• Microsoft .NET 6.0: from 6.0.0 before 6.0.8 — fixed in 6.0.8
• Microsoft .NET Core 3.1: from 3.1 before 3.1.28 — fixed in 3.1.28
• Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10): from 16.11.0 before 16.11.18 — fixed in 16.11.18
• Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8): from 15.0.0 before 16.9.24 — fixed in 16.9.24
• Microsoft Visual Studio 2022 version 17.0: from 17.0.0 before 17.0.13 — fixed in 17.0.13
• Microsoft Visual Studio 2022 version 17.2: from 17.2.0 before 17.2.7 — fixed in 17.2.7
• Microsoft PowerShell 7.0: from 7.0.0 before 7.0.12 — fixed in 7.0.12
• Microsoft PowerShell 7.2: from 7.2.0 before 7.2.6 — fixed in 7.2.6
• Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8): from 15.9.0 before 15.9.50 — fixed in 15.9.50

How to fix

Upgrade to a fixed version: Microsoft .NET 6.0.8; Microsoft Corporation .NET Core 3.1.28; Microsoft Powershell 7.0.12, 7.2.6; Microsoft .NET 6.0 6.0.8; Microsoft .NET Core 3.1 3.1.28; Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10) 16.11.18; Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8) 16.9.24; Microsoft Visual Studio 2022 version 17.0 17.0.13; Microsoft Visual Studio 2022 version 17.2 17.2.7; Microsoft PowerShell 7.0 7.0.12; Microsoft PowerShell 7.2 7.2.6; Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) 15.9.50. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-34716
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-34716

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