CVE-2025-8078 Command injection in ATP series firmware

High 7.2 Published 21 Oct 2025 Updated 26 Feb 2026

Authenticated administrators can execute arbitrary OS commands on Zyxel ATP and USG FLEX devices via crafted CLI arguments.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-8078?

CVE-2025-8078 is a high-severity command injection vulnerability in Zyxel ATP series firmware, published on 21 Oct 2025. An attacker needs administrator access to exploit it, with no action from the victim.

Official 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.

Weakness: CWE-78

Which versions are affected by CVE-2025-8078?

It affects 1 product.

Products include Zyxel Zld.

How do I fix CVE-2025-8078?

No fix has been published for CVE-2025-8078 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2025-8078 being exploited?

There is no known exploitation of CVE-2025-8078 in the wild and no public exploit code.

Sources

Also known as GHSA-fr9h-qfx7-p4r3.