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    CVE-2016-20030

    ZKTeco ZKBioSecurity 3.0 contains a user enumeration vulnerability that allows unauthenticated attackers to discover valid usernames by submitting partial characters via the username parameter. Attackers can send requests to the authLoginAction!login.do script with varying username inputs to enumerate valid user accounts based on application responses.

    Published:Mar 15, 2026
    Last Modified:Jul 28, 2026
    EPS:Mar 15, 2026
    EPSS Score:0.00563
    CVSS Score:9.8

    Affected Products

    Vendor
    Zkteco
    Product
    Zkbiosecurity
    Vendor
    Zkteco
    Product
    Zkbiosecurity Server

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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