HIGH CISA KEV
CVE-2021-43226
CVSS v3
7.8
HIGH
EPSS Score
7.5 %
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
Description
Windows Common Log File System Driver Elevation of Privilege Vulnerability
CISA Known Exploited Vulnerability
- Date Added
- 2025-10-06
- Patch Due Date
- 2025-10-27
- Ransomware Use
- Unknown
Technical details
- Published
- 2021-12-15
Frequently asked questions
What is CVE-2021-43226?
Windows Common Log File System Driver Elevation of Privilege Vulnerability
Is CVE-2021-43226 actively exploited?
Yes. CVE-2021-43226 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2025-10-27.
What is the CVSS score for CVE-2021-43226?
CVE-2021-43226 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2021-43226 affecting your environment?
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