CVE-2025-8078

State: Published
Severity: 7.2 High
Published: Oct 21, 2025
Updated: Feb 26, 2026
Reserved: Jul 23, 2025

Description

A post-authentication command injection vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.40, USG FLEX series firmware versions from V4.50 through V5.40, USG FLEX 50(W) series firmware versions from V4.16 through V5.40, and USG20(W)-VPN series firmware versions from V4.16 through V5.40 could allow an authenticated attacker with administrator privileges to execute operating system (OS) commands on the affected device by passing a crafted string as an argument to a CLI command.

Scores

CVSS	Score	Vector	Source
3.1	7.2 High	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	Zyxel

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Affected Products

Product	Versions
ATP series firmwareZyxel	versions from V4.32 through V5.40Affected
USG FLEX series firmwareZyxel	version from V4.50 through V5.40Affected
USG FLEX 50(W) series firmwareZyxel	versions from V4.16 through V5.40Affected
USG20(W)-VPN series firmwareZyxel	versions from V4.16 through V5.40Affected

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-post-authentication-command-injection-and-missing-authorization-vulnerabilities-in-zld-firewalls-10-21-2025vendor-advisory

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