CISA-confirmed known exploited vulnerability

CVE-2022-30525

Zyxel Multiple Firewalls OS Command Injection Vulnerability

Zyxel · Multiple Firewalls

Vulnerability details

A command injection vulnerability in the CGI program of some Zyxel firewall versions could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.

Added to CISA KEV: 2022-05-16

Ransomware campaign use: Unknown

CISA due date: 2022-06-06

Defensive guidance from CISA

Apply updates per vendor instructions.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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