CVE-2024-21386: .NET Denial of Service Vulnerability

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-02-13 · updated 2026-08-10
Weakness: CWE-400

Description

.NET Denial of Service Vulnerability

Affected products

Microsoft .NET Core: from 6.0.0 before 6.0.27; from 7.0.0 before 7.0.16; from 8.0.0 before 8.0.2 — fixed in 6.0.27, 7.0.16, 8.0.2
Microsoft Visual Studio 2022 version 17.14: from 17.4.0 before 17.4.16; from 17.6.0 before 17.6.12; from 17.8.0 before 17.8.7 — fixed in 17.4.16, 17.6.12, 17.8.7
Microsoft ASP.NET Core 6.0: from 6.0 before 6.0.27 — fixed in 6.0.27
Microsoft ASP.NET Core 7.0: from 7.0.0 before 7.0.16 — fixed in 7.0.16
Microsoft ASP.NET Core 8.0: from 8.0 before 8.0.2 — fixed in 8.0.2
Microsoft Visual Studio 2022 version 17.4: from 17.4.0 before 17.4.16 — fixed in 17.4.16
Microsoft Visual Studio 2022 version 17.6: from 17.6.0 before 17.6.12 — fixed in 17.6.12
Microsoft Visual Studio 2022 version 17.8: from 17.8.0 before 17.8.7 — fixed in 17.8.7

How to fix

Upgrade to a fixed version: Microsoft .NET Core 6.0.27, 7.0.16, 8.0.2; Microsoft Visual Studio 2022 version 17.14 17.4.16, 17.6.12, 17.8.7; Microsoft ASP.NET Core 6.0 6.0.27; Microsoft ASP.NET Core 7.0 7.0.16; Microsoft ASP.NET Core 8.0 8.0.2; Microsoft Visual Studio 2022 version 17.4 17.4.16; Microsoft Visual Studio 2022 version 17.6 17.6.12; Microsoft Visual Studio 2022 version 17.8 17.8.7. Check the vendor advisory for mitigations.

References

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