CVE-2021-43226

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Summary

CVECVE-2021-43226
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-12-15 15:15:00 UTC
Updated2023-12-28 00:15:00 UTC
DescriptionWindows Common Log File System Driver Elevation of Privilege Vulnerability This CVE ID is unique from CVE-2021-43207.

Risk And Classification

EPSS: 0.073130000 probability, percentile 0.916500000 (date 2026-04-02)

CISA KEV: Listed on 2025-10-06; due 2025-10-27; ransomware use Unknown

Problem Types: NVD-CWE-noinfo

CISA Known Exploited Vulnerability

VendorMicrosoft
ProductWindows
NameMicrosoft Windows Privilege Escalation Vulnerability
Required ActionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Noteshttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-43226 ; https://nvd.nist.gov/vuln/detail/CVE-2021-43226

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Microsoft Windows 10 - All All All
Operating System Microsoft Windows 10 1607 All All All
Operating System Microsoft Windows 10 1809 All All All
Operating System Microsoft Windows 10 1909 All All All
Operating System Microsoft Windows 10 2004 All All All
Operating System Microsoft Windows 10 20h2 All All All
Operating System Microsoft Windows 10 21h1 All All All
Operating System Microsoft Windows 11 - All All All
Operating System Microsoft Windows 7 - sp1 All All
Operating System Microsoft Windows 8.1 - All All All
Operating System Microsoft Windows Rt 8.1 - All All All
Operating System Microsoft Windows Server 2004 All All All
Operating System Microsoft Windows Server 2022 All All All
Operating System Microsoft Windows Server 20h2 All All All
Operating System Microsoft Windows Server 2008 - sp2 All All
Operating System Microsoft Windows Server 2008 r2 sp1 All All
Operating System Microsoft Windows Server 2012 - All All All
Operating System Microsoft Windows Server 2012 r2 All All All
Operating System Microsoft Windows Server 2016 - All All All
Operating System Microsoft Windows Server 2016 2004 All All All
Operating System Microsoft Windows Server 2019 - All All All

References

ReferenceSourceLinkTags
Security Update Guide - Microsoft Security Response Center MISC portal.msrc.microsoft.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Legacy QID Mappings

  • 91846 Microsoft Windows Security Update for December 2021
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