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CVE-2021-43226

KEV · Ransomware

Microsoft Windows Privilege Escalation Vulnerability

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Vendor / Project
Microsoft
Product
Windows
Date added
Oct 6, 2025
Due date
Oct 27, 2025
Known ransomware use
Known
CWEs
—

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

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