CVE-2020-0634

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-01-14 · updated 2026-06-17
Weakness: CWE-416

Description

An elevation of privilege vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory, aka 'Windows Common Log File System Driver Elevation of Privilege Vulnerability'.

Affected products

Microsoft Windows 10 Version 1607: 1607, 1709, 1803, 1809, 1903, 1909
Microsoft Windows 7: all versions
Microsoft Windows 8.1: all versions
Microsoft Windows RT 8.1: all versions
Microsoft Windows Server 2008: r2-sp1
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: 1803, 1903, 1909
Microsoft Windows Server 2019: all versions
Microsoft Corporation Windows: 10 Version 1803 for 32-bit Systems, 10 Version 1803 for x64-based Systems, 10 Version 1803 for ARM64-based Systems, 10 Version 1809 for 32-bit Systems, 10 Version 1809 for x64-based Systems, 10 Version 1809 for ARM64-based Systems (+12)
Microsoft Windows 10 Version 1903 for 32-bit Systems: all versions
Microsoft Windows 10 Version 1903 for ARM64-based Systems: all versions
Microsoft Windows 10 Version 1903 for x64-based Systems: all versions
Microsoft Windows 10 Version 1909 for 32-bit Systems: all versions
Microsoft Windows 10 Version 1909 for ARM64-based Systems: all versions
Microsoft Windows 10 Version 1909 for x64-based Systems: all versions
Microsoft Windows Server: version 1803 (Core Installation), 2019, 2019 (Core installation), 2016, 2016 (Core installation), 2008 for 32-bit Systems Service Pack 2 (+11)
Microsoft Windows Server, version 1903 (Server Core installation): all versions
Microsoft Windows Server, version 1909 (Server Core installation): all versions

References

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