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    CVE-2026-54800

    A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V26.20), SICORE Base system (All versions < V26.20.0). The affected application ships with a default configuration that disables all OPC UA security mechanisms. This could allow an attacker to gain unauthorized access and control over critical system functions.

    Published:Jul 9, 2026
    Last Modified:Aug 1, 2026
    EPS:Jul 9, 2026
    EPSS Score:0.00146
    CVSS Score:4.8

    Affected Products

    Vendor
    Siemens
    Product
    Cpci85 Central Processing\/communication
    Vendor
    Siemens
    Product
    Sicore Base System

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    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