RCE in Zyxel Atp Series Firmware
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.014 (73.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: +0.000
Affected products
- Zyxel Atp Series Firmware — versions versions from V5.35 through V5.41
- Zyxel Usg20(w)-Vpn Series Firmware — versions versions from V5.35 through V5.41
- Zyxel Usg Flex 50(w) Series Firmware — versions versions from V5.35 through V5.41
- Zyxel Usg Flex Series Firmware — versions versions from V5.35 through V5.41
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-11730?
- CVE-2025-11730 is a high-severity vulnerability in Zyxel Atp Series Firmware, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-02-05.
- How severe is CVE-2025-11730?
- High severity. CVSS v3 base score is 7.2 out of 10.