CVE-2026-4543 | Wavlink WL-WN578W2 221110 POST Request /cgi-bin/firewall.cgi dmz_flag/del_flag command injection

A vulnerability was found in Wavlink WL-WN578W2 221110. It has been rated as critical. The impacted element is an unknown function of the file /cgi-bin/firewall.cgi of the component POST Request Handler. Performing a manipulation of the argument dmz_flag/del_flag results in command injection.

This vulnerability is cataloged as CVE-2026-4543. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.

The vendor was contacted early about this disclosure but did not respond in any way.