A vulnerability classified as critical has been found in WAVLINK WN530H4, WN530HG4 and WN572HG3 up to 20221028. Affected is the function set_ipv6 of the file internet.cgi. The manipulation of the argument IPv6OpMode/IPv6IPAddr/IPv6WANIPAddr/IPv6GWAddr leads to command injection. It is possible to launch the attack 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.