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    CVE-2025-9495

    The Vitogate 300 web interface fails to enforce proper server-side authentication and relies on frontend-based authentication controls. This allows an attacker to simply modify HTML elements in the browser’s developer tools to bypass login restrictions. By removing specific UI elements, an attacker can reveal the hidden administration menu, giving them full control over the device.

    Published:Sep 23, 2025
    Last Modified:Apr 15, 2026
    EPS:Sep 23, 2025
    EPSS Score:0.00034
    CVSS Score:8.7

    Affected Products

    Vendor
    Viessmann
    Product
    Vitogate 300

    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