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    CVE-2021-1647

    Microsoft Defender Remote Code Execution Vulnerability

    Published:Jan 12, 2021
    Last Modified:Oct 30, 2025
    EPS:Jan 12, 2021
    EPSS Score:0.77465
    CVSS Score:7.8

    CISA Notification

    Description

    Microsoft Defender Remote Code Execution Vulnerability

    Required Action:

    Apply updates per vendor instructions.

    Notes:

    No extra notes provided.

    Due Date
    Nov 17, 2021
    1759 days ago
    Alert Date
    Nov 3, 2021
    1773 days ago

    Affected Products

    Vendor
    Microsoft
    Product
    Security Essentials
    Vendor
    Microsoft
    Product
    System Center Endpoint Protection
    Vendor
    Microsoft
    Product
    Windows 10 1507
    Vendor
    Microsoft
    Product
    Windows 10 1607
    Vendor
    Microsoft
    Product
    Windows 10 1803
    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 7
    Vendor
    Microsoft
    Product
    Windows 8.1
    Vendor
    Microsoft
    Product
    Windows Defender
    Vendor
    Microsoft
    Product
    Windows Rt 8.1
    Vendor
    Microsoft
    Product
    Windows Server 1909
    Vendor
    Microsoft
    Product
    Windows Server 2004
    Vendor
    Microsoft
    Product
    Windows Server 2008
    Vendor
    Microsoft
    Product
    Windows Server 2012
    Vendor
    Microsoft
    Product
    Windows Server 2016
    Vendor
    Microsoft
    Product
    Windows Server 2019
    Vendor
    Microsoft
    Product
    Windows Server 20h2

    Exploits

    https://github.com/findcool/cve-2021-1647

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2020-1002 (CVSS 7.1) — An elevation of privilege vulnerability exists when the MpSigStub.exe for Defender allows file deletion in arb…
    CVE-2019-1255 (CVSS 7.5) — A denial of service vulnerability exists when Microsoft Defender improperly handles files, aka 'Microsoft Defe…
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    CVE-2018-0986 (CVSS 8.8) — A remote code execution vulnerability exists when the Microsoft Malware Protection Engine does not properly sc…
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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