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    CVE-2026-20854

    Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.

    Published:Jan 13, 2026
    Last Modified:Apr 16, 2026
    EPS:Jan 13, 2026
    EPSS Score:0.00069
    CVSS Score:7.5

    Affected Products

    Vendor
    Microsoft
    Product
    Windows 11 24H2
    Vendor
    Microsoft
    Product
    Windows 11 24h2
    Vendor
    Microsoft
    Product
    Windows 11 25H2
    Vendor
    Microsoft
    Product
    Windows 11 25h2
    Vendor
    Microsoft
    Product
    Windows Server 2025

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-416 Use After Free

    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