HIGH 7.8 Microsoft
CVE-2026-44809
Windows Common Log File System Driver Elevation of Privilege Vulnerability
Microsoft Security Update 2026-Jun: Windows Common Log File System Driver Elevation of Privilege Vulnerability
Affected Products
- Windows Server 2025 (Server Core installation)
- Windows 11 Version 25H2 for ARM64-based Systems
- Windows 11 Version 25H2 for x64-based Systems
- Windows Server 2025
- Windows 11 Version 24H2 for ARM64-based Systems
- Windows 11 Version 24H2 for x64-based Systems
- Windows 11 version 26H1 for x64-based Systems
- Windows 11 Version 26H1 for ARM64-based Systems
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44809
- https://nvd.nist.gov/vuln/detail/CVE-2026-44809
This high severity vulnerability with a CVSS score of 7.8 was published on 2026-06-09 via Microsoft. Affected: Windows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems and 5 more.
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