## https://sploitus.com/exploit?id=SAINT:A7A4A1C67221FEAC6031316DCC24673F
Added: 05/20/2022
### Background
[Zyxel Firewalls](<https://www.zyxel.com/us/en/products_services/security-next_gen_firewall.shtml>) are a business solution providing protection from malware and unauthorized access.
### Problem
Zyxel USG FLEX, ATP series, and VPN series firewalls are affected by a vulnerability in the `**SetWanPortSt**` command which could allow an attacker to inject arbitrary commands.
### Resolution
Apply patch ZLD V5.30 or higher.
### References
<https://www.zyxel.com/us/en/support/Zyxel-security-advisory-for-OS-command-injection-vulnerability-of-firewalls.shtml>
### Platforms
Zyxel