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    CVE-2026-20833

    Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.

    Published:Jan 13, 2026
    Last Modified:Apr 16, 2026
    EPS:Jan 13, 2026
    EPSS Score:0.00029
    CVSS Score:5.5

    Affected Products

    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 2022 23h2
    Vendor
    Microsoft
    Product
    Windows Server 2025
    Vendor
    Microsoft
    Product
    Windows Server 23h2

    Exploits

    https://github.com/AlMarWorld/KerberosAudit-PShttps://github.com/v-jfanca/cve-2026-20833-rc4-kerberos

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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