CVE-2025-11730

Published Feb 5, 2026 CVSS 3.1 · 7.2 High EPSS 1.4% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Zyxel
Zyxel atp Series Firmware
Zyxel usg20(w)-vpn Series Firmware
Zyxel usg Flex 50(w) Series Firmware
Zyxel usg Flex Series Firmware
Vendors & Products Zyxel
Zyxel atp Series Firmware
Zyxel usg20(w)-vpn Series Firmware
Zyxel usg Flex 50(w) Series Firmware
Zyxel usg Flex Series Firmware
Type Values Removed Values Added
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.
Weaknesses CWE-78
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Zyxel
Published
Updated
Feb 26, 2026, 3:04 PM
Reserved
Oct 14, 2025, 2:35 AM
Status
Deferred
Published
Feb 5, 2026, 2:15 AM
Modified
Jun 17, 2026, 8:31 AM