Firetruck

CVE-2021-43226

KEV · Ransomware
Updated Aug 22, 2026 · PUBLISHED
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Description

Microsoft Windows Common Log File System Driver contains a privilege escalation vulnerability that could allow a local, privileged attacker to bypass certain security mechanisms.

Full record on cve.org →

Affected packages

PackageVendor / ProductVersion rangeStatus
Windows 10 Version 1507Microsoft / Windows 10 Version 1507>= 10.0.0, < 10.0.10240.19145affected
Windows 10 Version 1607Microsoft / Windows 10 Version 1607>= 10.0.0, < 10.0.14393.4825affected
Windows 10 Version 1809Microsoft / Windows 10 Version 1809>= 10.0.0, < 10.0.17763.2366affected
Windows 10 Version 1909Microsoft / Windows 10 Version 1909>= 10.0.0, < 10.0.18363.1977affected
Windows 10 Version 2004Microsoft / Windows 10 Version 2004>= 10.0.0, < 10.0.19041.1415affected
Windows 10 Version 20H2Microsoft / Windows 10 Version 20H2>= 10.0.0, < 10.0.19042.1415affected
Windows 10 Version 21H1Microsoft / Windows 10 Version 21H1>= 10.0.0, < 10.0.19043.1415affected
Windows 10 Version 21H2Microsoft / Windows 10 Version 21H2>= 10.0.0, < 10.0.19044.1415affected
Windows 11 version 21H2Microsoft / Windows 11 version 21H2>= 10.0.0, < 10.0.22000.376affected
Windows 7Microsoft / Windows 7>= 6.1.0, < 6.1.7601.25796affected
Windows 7 Service Pack 1Microsoft / Windows 7 Service Pack 1>= 6.1.0, < 6.1.7601.25796affected
Windows 8.1Microsoft / Windows 8.1>= 6.3.0, < 6.3.9600.20207affected
Windows Server 2008 R2 Service Pack 1Microsoft / Windows Server 2008 R2 Service Pack 1>= 6.1.0, < 6.1.7601.25796affected
Windows Server 2008 R2 Service Pack 1 (Server Core installation)Microsoft / Windows Server 2008 R2 Service Pack 1 (Server Core installation)>= 6.0.0, < 6.1.7601.25796affected
Windows Server 2008 Service Pack 2Microsoft / Windows Server 2008 Service Pack 2>= 6.0.0, < 6.0.6003.21309affected
Windows Server 2008 Service Pack 2Microsoft / Windows Server 2008 Service Pack 2>= 6.0.0, < 6.0.6003.21309affected
Windows Server 2008 Service Pack 2 (Server Core installation)Microsoft / Windows Server 2008 Service Pack 2 (Server Core installation)>= 6.0.0, < 6.0.6003.21309affected
Windows Server 2012Microsoft / Windows Server 2012>= 6.2.0, < 6.2.9200.23545affected
Windows Server 2012Microsoft / Windows Server 2012>= 6.2.0, < 6.2.9200.23540affected
Windows Server 2012 R2Microsoft / Windows Server 2012 R2>= 6.3.0, < 6.3.9600.20207affected
Windows Server 2012 R2 (Server Core installation)Microsoft / Windows Server 2012 R2 (Server Core installation)>= 6.3.0, < 6.3.9600.20207affected
Windows Server 2012 (Server Core installation)Microsoft / Windows Server 2012 (Server Core installation)>= 6.2.0, < 6.2.9200.23540affected
Windows Server 2012 (Server Core installation)Microsoft / Windows Server 2012 (Server Core installation)>= 6.2.0, < 6.2.9200.23545affected
Windows Server 2016Microsoft / Windows Server 2016>= 10.0.0, < 10.0.14393.4825affected
Windows Server 2016 (Server Core installation)Microsoft / Windows Server 2016 (Server Core installation)>= 10.0.0, < 10.0.14393.4825affected
Windows Server 2019Microsoft / Windows Server 2019>= 10.0.0, < 10.0.17763.2366affected
Windows Server 2019 (Server Core installation)Microsoft / Windows Server 2019 (Server Core installation)>= 10.0.0, < 10.0.17763.2366affected
Windows Server 2022Microsoft / Windows Server 2022>= 10.0.0, < 10.0.20348.405affected
Windows Server version 2004Microsoft / Windows Server version 2004>= 10.0.0, < 10.0.19041.1415affected
Windows Server version 20H2Microsoft / Windows Server version 20H2>= 10.0.0, < 10.0.19042.1415affected