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CVE-2022-24521: Microsoft Windows CLFS Driver Privilege Escalation Vulnerability

• Severity: medium (CVSS 4.6 v2.0)
• Exploited in the wild: yes — in CISA KEV since 2022-04-13
• EPSS: 7.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-04-15 · updated 2026-06-17
• Weakness: CWE-787

Description

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Affected products

• Microsoft Windows 10 Version 1507: before 10.0.10240.19265 — fixed in 10.0.10240.19265
• Microsoft Windows 10 1607: before 10.0.14393.5066 — fixed in 10.0.14393.5066
• Microsoft Windows 10: through 10.0.17763.2803
• Microsoft Windows 10 1909: before 10.0.18363.2212 — fixed in 10.0.18363.2212
• Microsoft Windows 10 20H2: before 10.0.19042.1645 — fixed in 10.0.19042.1645
• Microsoft Windows 10 21H1: before 10.0.19043.1645 — fixed in 10.0.19043.1645
• Microsoft Windows 10: before 10.0.19044.1645 — fixed in 10.0.19044.1645
• Microsoft Windows 11 21H2: before 10.0.22000.613 — fixed in 10.0.22000.613
• 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: before 10.0.14393.5066 — fixed in 10.0.14393.5066
• Microsoft Windows Server 2019: before 10.0.17763.2803 — fixed in 10.0.17763.2803
• Microsoft Windows Server 2022: before 10.0.20348.643 — fixed in 10.0.20348.643
• Microsoft Windows Server 20H2: before 10.0.19042.1645 — fixed in 10.0.19042.1645

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 10.0.10240.19265; Microsoft Windows 10 1607 10.0.14393.5066; Microsoft Windows 10 1909 10.0.18363.2212; Microsoft Windows 10 20H2 10.0.19042.1645; Microsoft Windows 10 21H1 10.0.19043.1645; Microsoft Windows 10 10.0.19044.1645; Microsoft Windows 11 21H2 10.0.22000.613; Microsoft Windows Server 2016 10.0.14393.5066; Microsoft Windows Server 2019 10.0.17763.2803; Microsoft Windows Server 2022 10.0.20348.643; Microsoft Windows Server 20H2 10.0.19042.1645. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-24521
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-24521
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-24521

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