Wavlink NU516U1 firewall.cgi sub_401778 command injection

A vulnerability has been found in Wavlink NU516U1 M16U1_V240425. The affected element is the function sub_401778 of the file /cgi-bin/firewall.cgi. Such manipulation of the argument dmz_flag leads to command injection. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.