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    CVE-2021-26889

    Windows Update Stack Elevation of Privilege Vulnerability

    Published:Mar 11, 2021
    Last Modified:Aug 19, 2026
    EPS:Mar 11, 2021
    EPSS Score:0.01027
    CVSS Score:7.8

    Affected Products

    Vendor
    Microsoft
    Product
    Windows 10
    Vendor
    Microsoft
    Product
    Windows 10 1809
    Vendor
    Microsoft
    Product
    Windows 10 1909
    Vendor
    Microsoft
    Product
    Windows 10 20H2
    Vendor
    Microsoft
    Product
    Windows Server 1909
    Vendor
    Microsoft
    Product
    Windows Server 2004
    Vendor
    Microsoft
    Product
    Windows Server 2016
    Vendor
    Microsoft
    Product
    Windows Server 2019
    Vendor
    Microsoft
    Product
    Windows Server 20H2

    Exploits

    No exploit reference

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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