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    CVE-2026-34021

    The Wertheim SafeController 5400, Controller 5400 - AssemblyVersion 6.11.8130.22320, uses RS-485 communication between the server and the microcontroller without cryptographic protection. An attacker with access to the communication path between the server and the microcontroller can sniff RS-485 messages and replay previously observed messages. This can be used, for example, to spoof a "quit alarm" message and continuously deactivate the safe alarm.

    Published:Jun 15, 2026
    Last Modified:Jun 23, 2026
    EPS:Jun 15, 2026
    EPSS Score:0.00196
    CVSS Score:8.6

    Affected Products

    Vendor
    Wertheim
    Product
    Safecontroller 5400 Hardware For Vault Rooms (safe Deposit Locker System - Microcontroller)

    Exploits

    No exploit reference

    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