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CVE-2024-21409: .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability

• Severity: high (CVSS 7.3 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: 2024-04-09 · updated 2026-06-17
• Weakness: CWE-416

Description

.NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability

Affected products

• Microsoft .NET: from 6.0.0 before 6.0.29; from 7.0.0 before 7.0.18; from 8.0.0 before 8.0.4 — fixed in 6.0.29, 7.0.18, 8.0.4
• Microsoft .NET Framework: 3.5, 4.8.1, 4.7.2, 4.8, 4.6.2, 4.7 (+1)
• Microsoft Powershell: from 7.2 before 7.2.19; from 7.3 before 7.3.12; from 7.4 before 7.4.2 — fixed in 7.2.19, 7.3.12, 7.4.2
• Microsoft Visual Studio 2022 version 17.14: from 17.4.0 before 17.4.18; from 17.6.0 before 17.6.14; from 17.8.0 before 17.8.9; from 17.9.0 before 17.9.6 — fixed in 17.4.18, 17.6.14, 17.8.9, 17.9.6
• Microsoft .NET 6.0: from 6.0.0 before 6.0.29 — fixed in 6.0.29
• Microsoft .NET 7.0: from 7.0.0 before 7.0.18 — fixed in 7.0.18
• Microsoft .NET 8.0: from 8.0 before 8.0.4 — fixed in 8.0.4
• Microsoft .NET Framework 3.5 AND 4.7.2: from 4.7.0 before 4.7.4092.0 — fixed in 4.7.4092.0
• Microsoft .NET Framework 3.5 AND 4.8: from 4.8.0 before 4.8.4718.0 — fixed in 4.8.4718.0
• Microsoft .NET Framework 3.5 AND 4.8.1: from 4.8.1 before 4.8.9236.0 — fixed in 4.8.9236.0
• Microsoft .NET Framework 4.6.2: from 4.7.0 before 4.7.4092.0 — fixed in 4.7.4092.0
• Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2: from 4.7.0 before 4.7.4092.0 — fixed in 4.7.4092.0
• Microsoft .NET Framework 4.8: from 4.8.0 before 4.8.4718.0 — fixed in 4.8.4718.0
• Microsoft Visual Studio 2022 version 17.4: from 17.4.0 before 17.4.18 — fixed in 17.4.18
• Microsoft Visual Studio 2022 version 17.6: from 17.6.0 before 17.6.14 — fixed in 17.6.14
• Microsoft Visual Studio 2022 version 17.8: from 17.8.0 before 17.8.9 — fixed in 17.8.9
• Microsoft Visual Studio 2022 version 17.9: from 17.0 before 17.9.6 — fixed in 17.9.6
• Microsoft PowerShell 7.2: from 7.2.0 before 7.2.19 — fixed in 7.2.19
• Microsoft PowerShell 7.3: from 7.3.0 before 7.3.12 — fixed in 7.3.12
• Microsoft PowerShell 7.4: from 7.4.0 before 7.4.2 — fixed in 7.4.2

How to fix

Upgrade to a fixed version: Microsoft .NET 6.0.29, 7.0.18, 8.0.4; Microsoft Powershell 7.2.19, 7.3.12, 7.4.2; Microsoft Visual Studio 2022 version 17.14 17.4.18, 17.6.14, 17.8.9, 17.9.6; Microsoft .NET 6.0 6.0.29; Microsoft .NET 7.0 7.0.18; Microsoft .NET 8.0 8.0.4; Microsoft .NET Framework 3.5 AND 4.7.2 4.7.4092.0; Microsoft .NET Framework 3.5 AND 4.8 4.8.4718.0; Microsoft .NET Framework 3.5 AND 4.8.1 4.8.9236.0; Microsoft .NET Framework 4.6.2 4.7.4092.0; Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.7.4092.0; Microsoft .NET Framework 4.8 4.8.4718.0. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21409
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21409
• https://security.netapp.com/advisory/ntap-20250117-0002/

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