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    CVE-2025-11730

    A post‑authentication command injection vulnerability in the Dynamic DNS (DDNS) configuration CLI command in Zyxel ATP series firmware versions from V5.35 through V5.41, USG FLEX series firmware versions from V5.35 through V5.41, USG FLEX 50(W) series firmware versions from V5.35 through V5.41, and USG20(W)-VPN series firmware versions from V5.35 through V5.41 could allow an authenticated attacker with administrator privileges to execute operating system (OS) commands on an affected device by supplying a specially crafted string as an argument to the CLI command.

    Published:Feb 5, 2026
    Last Modified:Apr 15, 2026
    EPS:Feb 5, 2026
    EPSS Score:0.00102
    CVSS Score:7.2

    Affected Products

    Vendor
    Zyxel
    Product
    Atp Series Firmware
    Vendor
    Zyxel
    Product
    Usg20(w)-vpn Series Firmware
    Vendor
    Zyxel
    Product
    Usg Flex 50(w) Series Firmware
    Vendor
    Zyxel
    Product
    Usg Flex Series Firmware

    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