SB2025102144 - Multiple vulnerabilities in Zyxel firewalls

Security Bulletin ID SB2025102144

Severity

Medium

Patch available

YES

Number of vulnerabilities 2

Exploitation vector Remote access

Highest impact Data manipulation

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) OS Command Injection (CVE-ID: CVE-2025-8078)

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.

2) Missing Authorization (CVE-ID: CVE-2025-9133)

The vulnerability allows a remote attacker to bypass authorization checks.

The vulnerability exists due to missing authorization. A remote user can view and download the system configuration from the target device.

Remediation

Install update from vendor's website.

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