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CVE-2024-21312: .NET Framework Denial of Service Vulnerability

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-09 · updated 2026-06-17
• Weakness: CWE-20

Description

.NET Framework Denial of Service Vulnerability

Affected products

• Microsoft .NET Framework: 3.5, 4.8.1, 4.6.2, 4.7, 4.7.1, 4.7.2 (+1)
• Microsoft .NET Framework 3.5: from 3.5.0 before 3.0.50727.8976 — fixed in 3.0.50727.8976
• Microsoft .NET Framework 3.5 AND 4.7.2: from 4.7.0 before 4.7.04081.03 — fixed in 4.7.04081.03
• Microsoft .NET Framework 3.5 AND 4.8: from 4.8.0 before 4.8.04690.02 — fixed in 4.8.04690.02
• Microsoft .NET Framework 3.5 AND 4.8.1: from 4.8.1 before 4.8.09214.01 — fixed in 4.8.09214.01
• Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2: from 4.7.0 before 4.7.04081.02 — fixed in 4.7.04081.02
• Microsoft .NET Framework 4.8: from 4.8.0 before 4.8.04690.02 — fixed in 4.8.04690.02

How to fix

Upgrade to a fixed version: Microsoft .NET Framework 3.5 3.0.50727.8976; Microsoft .NET Framework 3.5 AND 4.7.2 4.7.04081.03; Microsoft .NET Framework 3.5 AND 4.8 4.8.04690.02; Microsoft .NET Framework 3.5 AND 4.8.1 4.8.09214.01; Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.7.04081.02; Microsoft .NET Framework 4.8 4.8.04690.02. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21312
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21312
• https://security.netapp.com/advisory/ntap-20240208-0008/

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