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    CVE-2021-43226

    Windows Common Log File System Driver Elevation of Privilege Vulnerability

    Published:Dec 15, 2021
    Last Modified:Oct 30, 2025
    EPS:Dec 15, 2021
    EPSS Score:0.31881
    CVSS Score:7.8

    CISA Notification

    Description

    Windows Common Log File System Driver Elevation of Privilege Vulnerability

    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:

    No extra notes provided.

    Due Date
    Oct 27, 2025
    319 days ago
    Alert Date
    Oct 6, 2025
    340 days ago

    Affected Products

    Vendor
    Microsoft
    Product
    Windows 10 1507
    Vendor
    Microsoft
    Product
    Windows 10 1607
    Vendor
    Microsoft
    Product
    Windows 10 1809
    Vendor
    Microsoft
    Product
    Windows 10 1909
    Vendor
    Microsoft
    Product
    Windows 10 2004
    Vendor
    Microsoft
    Product
    Windows 10 20H2
    Vendor
    Microsoft
    Product
    Windows 10 20h2
    Vendor
    Microsoft
    Product
    Windows 10 21H1
    Vendor
    Microsoft
    Product
    Windows 10 21H2
    Vendor
    Microsoft
    Product
    Windows 10 21h1
    Vendor
    Microsoft
    Product
    Windows 10 21h2
    Vendor
    Microsoft
    Product
    Windows 11 21H2
    Vendor
    Microsoft
    Product
    Windows 11 21h2
    Vendor
    Microsoft
    Product
    Windows 7
    Vendor
    Microsoft
    Product
    Windows 8.1
    Vendor
    Microsoft
    Product
    Windows Rt 8.1
    Vendor
    Microsoft
    Product
    Windows Server 2004
    Vendor
    Microsoft
    Product
    Windows Server 2008
    Vendor
    Microsoft
    Product
    Windows Server 2008 R2
    Vendor
    Microsoft
    Product
    Windows Server 2008 Sp2
    Vendor
    Microsoft
    Product
    Windows Server 2012
    Vendor
    Microsoft
    Product
    Windows Server 2012 R2
    Vendor
    Microsoft
    Product
    Windows Server 2016
    Vendor
    Microsoft
    Product
    Windows Server 2019
    Vendor
    Microsoft
    Product
    Windows Server 2022
    Vendor
    Microsoft
    Product
    Windows Server 20H2
    Vendor
    Microsoft
    Product
    Windows Server 20h2

    Exploits

    https://github.com/Rosayxy/cve-2021-43226PoC

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High