Unrated severityNVD Advisory· Published Oct 21, 2025· Updated Feb 26, 2026

CVE-2025-8078

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.

Affected products

Zyxel/ATP seriesllm-fuzzy
Range: V4.32 through V5.40
Zyxel/USG FLEX seriesllm-fuzzy
Range: V4.50 through V5.40
Zyxel/USG20(W)-VPN seriesllm-fuzzy
Range: V4.16 through V5.40
Zyxel/ATP series firmwarev5
Range: versions from V4.32 through V5.40
Zyxel/USG20(W)-VPN series firmwarev5
Range: versions from V4.16 through V5.40
Zyxel/USG FLEX 50(W) series firmwarev5
Range: versions from V4.16 through V5.40
Zyxel/USG FLEX series firmwarev5
Range: version from V4.50 through V5.40

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

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

News mentions

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