CVE-2021-43226

VendormicrosoftProductwindows 7, windows server 2008, windows 10 1507, windows 8.1, windows rt 8.1, windows server 2012, windows 10 1607, windows 10 1809, windows 10 21h2, windows server 2016, windows server 2019, windows server 2022, windows 11 21h2, windows 10 1909, windows 10 20h2, windows 10 21h1, windows 10 2004, windows server 20h2, windows server 2004DiscoveredDec 15, 2021UpdatedAug 22, 2026

Windows Common Log File System Driver Elevation of Privilege Vulnerability

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CVSS v3.1

7.8 HIGH

EPSS

3.28%

probability of exploitation in 30 days

CISA KEV

Listed

confirmed active exploitation

News coverage

sources referencing this CVE

Related IOCs

seen in the same coverage

EPSS Trend

Aug 16, 2026 → Oct 22, 2026

▲ 0.20pp

3.07% → 3.28% over 3 tracked changes

CVSS v3.1 Detail

Attack VectorLOCAL

Attack ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

ScopeUNCHANGED

ConfidentialityHIGH

IntegrityHIGH

AvailabilityHIGH

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

Connections

19 relationships