Microsoft Windows CLFS Driver Privilege Escalation Vulnerability

HIGH 7.8EXPLOITED (CISA KEV)CVE-2022-24521 · Published 15/04/2022 · updated 17/06/2026

Microsoft Windows CLFS Driver Privilege Escalation Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 13/04/2022. Patch affected systems as an emergency. It is known to be used in ransomware campaigns.

In short

CVE-2022-24521 is a HIGH (CVSS 7.8) vulnerability.
Exploited in the wild: CISA added it to the KEV catalog on 13/04/2022.
Chance of exploitation in the next 30 days (EPSS): 7.1%, higher than 94.3% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
Windows Microsoft	Versions not published yet (product named by CISA KEV)

Description

Windows Common Log File System Driver Elevation of Privilege Vulnerability

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2022-24521 · Patch
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2022-24521

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