A command injection vulnerability exists in the TOTOLINK A950RG Router firmware V5.9c.4592_B20191022_ALL within the system.so binary. The setDiagnosisCfg function retrieves the ipDoamin parameter from user input via websGetVar and concatenates it directly into a ping system command executed via CsteSystem() without any sanitization. An unauthenticated remote attacker can exploit this vulnerability to execute arbitrary commands on the device through specially crafted HTTP requests to the routers web interface.