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CVE-2021-43226CISA KEV

Microsoft Windows Privilege Escalation Vulnerability

CISA lists this Microsoft vulnerability as known exploited. Its MSRC release detail is outside this installation's collected history.

CISA KEV Check MSRC

CISA catalog record

Microsoft Windows Common Log File System Driver contains a privilege escalation vulnerability that could allow a local, privileged attacker to bypass certain security mechanisms.

Product
Windows
Added to KEV
6 Oct 2025
Federal remediation due
27 Oct 2025
Known ransomware use
Yes
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