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CVE-2023-36560: ASP.NET Security Feature Bypass Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-14 · updated 2026-06-17

Description

ASP.NET Security Feature Bypass Vulnerability

Affected products

• Microsoft .NET Framework: 2.0-sp2, 3.0-sp2, 3.5, 4.6.2, 4.7, 4.7.1 (+4)
• Microsoft .NET Framework 2.0 Service Pack 2: from 2.0.0 before 3.0.50727.8975 — fixed in 3.0.50727.8975
• Microsoft .NET Framework 3.0 Service Pack 2: from 3.0.0 before 3.0.50727.8975 — fixed in 3.0.50727.8975
• Microsoft .NET Framework 3.5: from 3.5.0 before 3.0.50727.8975 — fixed in 3.0.50727.8975
• Microsoft .NET Framework 3.5.1: from 3.5.0 before 3.0.50727.8975 — fixed in 3.0.50727.8975
• Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2: from 3.0.0.0 before 10.0.14393.6452 — fixed in 10.0.14393.6452
• Microsoft .NET Framework 3.5 AND 4.6/4.6.2: from 10.0.0 before 10.0.10240.20308 — fixed in 10.0.10240.20308
• Microsoft .NET Framework 3.5 AND 4.7.2: from 4.7.0 before 4.7.4076.0 — fixed in 4.7.4076.0
• Microsoft .NET Framework 3.5 AND 4.8: from 4.8.0 before 4.8.4682.0 — fixed in 4.8.4682.0
• Microsoft .NET Framework 3.5 AND 4.8.1: from 4.8.1 before 4.8.9206.0 — fixed in 4.8.9206.0
• Microsoft .NET Framework 4.6.2: from 4.7.0 before 4.7.4076.0 — fixed in 4.7.4076.0
• Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2: from 4.7.0 before 4.7.4076.0 — fixed in 4.7.4076.0
• Microsoft .NET Framework 4.8: from 4.8.0 before 4.8.4682.0 — fixed in 4.8.4682.0

How to fix

Upgrade to a fixed version: Microsoft .NET Framework 2.0 Service Pack 2 3.0.50727.8975; Microsoft .NET Framework 3.0 Service Pack 2 3.0.50727.8975; Microsoft .NET Framework 3.5 3.0.50727.8975; Microsoft .NET Framework 3.5.1 3.0.50727.8975; Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 10.0.14393.6452; Microsoft .NET Framework 3.5 AND 4.6/4.6.2 10.0.10240.20308; Microsoft .NET Framework 3.5 AND 4.7.2 4.7.4076.0; Microsoft .NET Framework 3.5 AND 4.8 4.8.4682.0; Microsoft .NET Framework 3.5 AND 4.8.1 4.8.9206.0; Microsoft .NET Framework 4.6.2 4.7.4076.0; Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.7.4076.0; Microsoft .NET Framework 4.8 4.8.4682.0. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36560
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36560

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