Description
An incorrect permission assignment vulnerability in the PostgreSQL commands of the Zyxel USG FLEX H series uOS firmware versions from V1.20 through V1.31 could allow an authenticated local attacker with low privileges to gain access to the Linux shell and escalate their privileges by crafting malicious scripts or modifying system configurations with administrator-level access through a stolen token. Modifying the system configuration is only possible if the administrator has not logged out and the token remains valid.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Zyxel | USG FLEX H series uOS firmware | from V1.20 through V1.31 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Exploit-DB 1
- Zyxel USG FLEX H series uOS 1.31 - Privilege Escalation EDB-52293 · local · May 18, 2025
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- WID-SEC-2025-0855 Zyxel Firewall: Mehrere Schwachstellen ermöglichen Privilegieneskalation BSI CERT-Bund (WID) · Apr 21, 2025