CVE-2021-43226

HIGH7.8

CISA KEV

Published 2021-12-15 · Updated 2026-08-22 · Source secure@microsoft.com

Description

Windows Common Log File System Driver Elevation of Privilege Vulnerability

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA Known-Exploited Vulnerability

Product: Microsoft — Windows

Name: Microsoft Windows Privilege Escalation Vulnerability

Date added: 2025-10-06 · Due: 2025-10-27

USED IN RANSOMWARE

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

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