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CVE-2023-36046: Windows Authentication Denial of Service Vulnerability

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-14 · updated 2026-06-17
• Weakness: CWE-59

Description

Windows Authentication Denial of Service Vulnerability

Affected products

• Microsoft Windows 11 21H2: before 10.0.22000.2600 — fixed in 10.0.22000.2600
• Microsoft Windows 11: before 10.0.22621.2715 — fixed in 10.0.22621.2715
• Microsoft Windows 11: before 10.0.22621.2715 — fixed in 10.0.22621.2715
• Microsoft Windows Server 2022: all versions
• Microsoft Windows 11 21H2: from 10.0.0 before 10.0.22000.2600 — fixed in 10.0.22000.2600
• Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.2715 — fixed in 10.0.22621.2715
• Microsoft Windows 11 version 22H3: from 10.0.22631.0 before 10.0.22631.2715 — fixed in 10.0.22631.2715
• Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.2715 — fixed in 10.0.22631.2715
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.531 — fixed in 10.0.25398.531

How to fix

Upgrade to a fixed version: Microsoft Windows 11 21H2 10.0.22000.2600; Microsoft Windows 11 10.0.22621.2715; Microsoft Windows 11 10.0.22621.2715; Microsoft Windows 11 21H2 10.0.22000.2600; Microsoft Windows 11 10.0.22621.2715; Microsoft Windows 11 version 22H3 10.0.22631.2715; Microsoft Windows 11 10.0.22631.2715; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.531. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36046
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36046

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