7.2
/ 10
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Description
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.
Basic Information
ID
CVE-2025-11730
Source
Zyxel
Published
Feb 5, 2026 at 01:55
Affected Product
Vendor
Zyxel
Product
ATP series firmware
Version
versions from V5.35 through V5.41
Affected Versions
Zyxel ATP series firmware versions from V5.35 through V5.41
Zyxel USG FLEX series firmware versions from V5.35 through V5.41
Zyxel USG FLEX 50(W) series firmware versions from V5.35 through V5.41
Zyxel USG20(W)-VPN series firmware versions from V5.35 through V5.41
Zyxel USG FLEX series firmware versions from V5.35 through V5.41
Zyxel USG FLEX 50(W) series firmware versions from V5.35 through V5.41
Zyxel USG20(W)-VPN series firmware versions from V5.35 through V5.41