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CVE-2023-35633: Windows Kernel Elevation of Privilege Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 8.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-12 · updated 2026-06-17
• Weakness: CWE-59

Description

Windows Kernel Elevation of Privilege Vulnerability

Affected products

• Microsoft Windows 10 Version 1507: before 10.0.10240.20345 — fixed in 10.0.10240.20345
• Microsoft Windows Server 2008: r2-sp1
• Microsoft Windows Server 2012: r2
• Microsoft Windows 10 Version 1507: from 10.0.10240.0 before 10.0.10240.20345 — fixed in 10.0.10240.20345
• Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before 6.1.7601.26864 — fixed in 6.1.7601.26864
• Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before 6.0.6003.22413 — fixed in 6.0.6003.22413
• Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.24614 — fixed in 6.2.9200.24614
• Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.21715 — fixed in 6.3.9600.21715

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 10.0.10240.20345; Microsoft Windows 10 Version 1507 10.0.10240.20345; Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.26864; Microsoft Windows Server 2008 Service Pack 2 6.0.6003.22413; Microsoft Windows Server 2012 6.2.9200.24614; Microsoft Windows Server 2012 R2 6.3.9600.21715. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35633
• http://packetstormsecurity.com/files/176451/Microsoft-Windows-Registry-Predefined-Keys-Privilege-Escalation.html
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35633

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