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A privilege escalation vulnerability exists in the CLI command interface of multiple Zyxel firewall and VPN device firmware versions. The flaw allows a local attacker to execute certain OS commands with root privileges in specific directories, bypassing intended privilege restrictions. Affected products include USG FLEX, USG20(W)-VPN, ATP, VPN, and USG/ZyWALL series running vulnerable firmware versions.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module (modules/exploits/linux/local/zyxel_suid_cp_lpe.rb) that exploits CVE-2022-30526, a local privilege escalation vulnerability in several Zyxel firewall products. The exploit targets a SUID binary ('zysudo.suid') that allows arbitrary file copying as root. By overwriting the firewall's crontab file, the module schedules execution of an attacker-supplied payload as root, effectively granting full system compromise from a low-privileged shell. The module first verifies the target is a Zyxel firewall by reading /zyinit/fwversion, then abuses the SUID binary to overwrite /var/zyxel/crontab. The exploit supports both command and staged payloads (e.g., reverse shell, Meterpreter) and is weaponized for use within the Metasploit framework. The only file in the repository is the exploit module itself, written in Ruby, and it is structured to provide reliable privilege escalation on affected Zyxel firewall models.
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