Skip to main content
← All vulnerabilities
CVE-2021-43226

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Published
Last modified
published
Listed in CISA KEV
Fix
Fixed in 10.0.17763.2366, 10.0.18363.1977, 10.0.19043.1415, 10.0.20348.405, 10.0.19041.1415, and 10 more
None on Exploit-DB, Metasploit or GitHub

Summary

Microsoft Windows systems that include the Common Log File System (CLFS) driver are affected by this vulnerability. A local attacker who can run code on an affected machine could exploit it to gain higher, system-level privileges.

Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.

Read the original description

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Timeline

  1. CVE published
  2. Added to CISA KEV

    CISA has evidence of exploitation in the wild

  3. CISA remediation deadline

    Due date for US federal agencies to patch

  4. Record last updated

Affected versions

  • Microsoft Windows 10 Version 1809

    From 10.0.0 · fixed in 10.0.17763.2366

  • Microsoft Windows Server 2019

    From 10.0.0 · fixed in 10.0.17763.2366

  • Microsoft Windows Server 2019 (Server Core installation)

    From 10.0.0 · fixed in 10.0.17763.2366

  • Microsoft Windows 10 Version 1909

    From 10.0.0 · fixed in 10.0.18363.1977

  • Microsoft Windows 10 Version 21H1

    From 10.0.0 · fixed in 10.0.19043.1415

  • Microsoft Windows Server 2022

    From 10.0.0 · fixed in 10.0.20348.405

  • Microsoft Windows 10 Version 2004

    From 10.0.0 · fixed in 10.0.19041.1415

  • Microsoft Windows Server version 2004

    From 10.0.0 · fixed in 10.0.19041.1415

  • Microsoft Windows 10 Version 20H2

    From 10.0.0 · fixed in 10.0.19042.1415

  • Microsoft Windows Server version 20H2

    From 10.0.0 · fixed in 10.0.19042.1415

  • Microsoft Windows 11 version 21H2

    From 10.0.0 · fixed in 10.0.22000.376

  • Microsoft Windows 10 Version 21H2

    From 10.0.0 · fixed in 10.0.19044.1415

  • Microsoft Windows 10 Version 1507

    From 10.0.0 · fixed in 10.0.10240.19145

  • Microsoft Windows 10 Version 1607

    From 10.0.0 · fixed in 10.0.14393.4825

  • Microsoft Windows Server 2016

    From 10.0.0 · fixed in 10.0.14393.4825

  • Microsoft Windows Server 2016 (Server Core installation)

    From 10.0.0 · fixed in 10.0.14393.4825

  • Microsoft Windows 7

    From 6.1.0 · fixed in 6.1.7601.25796

  • Microsoft Windows 7 Service Pack 1

    From 6.1.0 · fixed in 6.1.7601.25796

  • Microsoft Windows 8.1

    From 6.3.0 · fixed in 6.3.9600.20207

  • Microsoft Windows Server 2008 Service Pack 2

    From 6.0.0 · fixed in 6.0.6003.21309

  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)

    From 6.0.0 · fixed in 6.0.6003.21309

  • Microsoft Windows Server 2008 Service Pack 2

    From 6.0.0 · fixed in 6.0.6003.21309

  • Microsoft Windows Server 2008 R2 Service Pack 1

    From 6.1.0 · fixed in 6.1.7601.25796

  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)

    From 6.0.0 · fixed in 6.1.7601.25796

  • Microsoft Windows Server 2012

    From 6.2.0 · fixed in 6.2.9200.23545; From 6.2.0 · fixed in 6.2.9200.23540

  • Microsoft Windows Server 2012 (Server Core installation)

    From 6.2.0 · fixed in 6.2.9200.23545; From 6.2.0 · fixed in 6.2.9200.23540

  • Microsoft Windows Server 2012 R2

    From 6.3.0 · fixed in 6.3.9600.20207

  • Microsoft Windows Server 2012 R2 (Server Core installation)

    From 6.3.0 · fixed in 6.3.9600.20207

References 1

portal.msrc.microsoft.com