Main Vulnerability Database Vulnerabilities #VU117397

OS Command Injection in ZyXEL Communications Corp. products - CVE-2025-8078

Published: October 21, 2025

Vulnerability identifier: #VU117397

CSH Severity: Low

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-8078

CWE-ID: CWE-78

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation. A remote administrator can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Affected software

ATP series
USG FLEX series
USG FLEX 50W
USG20W-VPN

How to mitigate CVE-2025-8078

Install updates from vendor's website.

ATP series - update to 5.41
USG FLEX series - update to 5.41
USG FLEX 50W - update to 5.41
USG20W-VPN - update to 5.41

External 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-10-21-2025

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