CVE-2021-43226 — Microsoft Windows Privilege Escalation Vulnerability
CVE-2021-43226: Microsoft Windows Privilege Escalation Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Microsoft |
| Product | Windows |
| Date added | 2025-10-06 |
| Due date | 2025-10-27 |
| Ransomware campaign use | Unknown |
Description
Microsoft Windows Common Log File System Driver contains a privilege escalation vulnerability that could allow a local, privileged attacker to bypass certain security mechanisms.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-43226 ; https://nvd.nist.gov/vuln/detail/CVE-2021-43226
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-43226
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog