CVE DATABASE / CVE-2022-24521
CVE-2022-24521
Microsoft Windows CLFS Driver Privilege Escalation Vulnerability
CVSS 7.8 · HIGH
⚠ CISA KEV — ACTIVELY EXPLOITED
RANSOMWARE
On the CISA KEV catalog
Confirmed exploited in the wild. Added 2022-04-13.
Federal remediation due 2022-05-04.
Required action: Apply updates per vendor instructions.
Summary
Windows Common Log File System Driver Elevation of Privilege Vulnerability
CVSS 3.1 breakdown
| Base score | 7.8 (HIGH) |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Attack vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity | HIGH |
| Availability | HIGH |
Weakness type (CWE)
Affected products
Microsoft windows 10 1507Microsoft windows 10 1607Microsoft windows 10 1809Microsoft windows 10 1909Microsoft windows 10 20h2Microsoft windows 10 21h1Microsoft windows 10 21h2Microsoft windows 11 21h2Microsoft windows 7Microsoft windows 8.1Microsoft windows rt 8.1Microsoft windows server 2008Microsoft windows server 2012Microsoft windows server 2016Microsoft windows server 2019Microsoft windows server 2022Microsoft windows server 20h2
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References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-24521
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-24521
Data: NIST NVD + CISA KEV. NVD last modified 2025-10-30. Always verify against the vendor advisory before acting.