SB2025042328 - Multiple vulnerabilities in Zyxel USG FLEX H

Security Bulletin ID SB2025042328

Severity

Low

Patch available

YES

Number of vulnerabilities 2

Exploitation vector Local access

Highest impact Code execution

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Incorrect permission assignment for critical resource (CVE-ID: CVE-2025-1731)

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to incorrect permission assignment in the PostgreSQL commands. A local user can gain access to the Linux shell and escalate their privileges.

2) Improper privilege management (CVE-ID: CVE-2025-1732)

The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to improper privilege management in the recovery function. A local administrator can upload a specially crafted configuration file and escalate privileges on the target device.

Remediation

Install update from vendor's website.

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-incorrect-permission-assignment-and-improper-privilege-management-vulnerabilities-in-usg-flex-h-series-firewalls-04-22-2025