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    CVE-2026-3869

    CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and availability of the PLC provided an application project with a lower application level is running on the PLC.

    Published:Sep 11, 2026
    Last Modified:Sep 13, 2026
    EPS:Sep 11, 2026
    EPSS Score:0.00543
    CVSS Score:9.2

    Affected Products

    Vendor
    Schneider-electric
    Product
    Modicon M580
    Vendor
    Schneider-electric
    Product
    Modicon M580 Safety

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-90 Reflection Attack in Authentication Protocol

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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