ChinaMobile PLC Wireless Router GPN2.4P21-C-CN devices with firmware W2001EN-00 have an Incorrect Access Control vulnerability via the cgi-bin/webproc?getpage=html/index.html subpage=wlsecurity URI, allowing an Attacker to change the Wireless Security Password.
packetstormsecurity.com/files/151274/PLC-Wireless-Router-GPN2.4P21-C-CN-Incorrect-Access-Control.html
packetstormsecurity.com/files/152166/PLC-Wireless-Router-GPN2.4P21-C-CN-Incorrect-Access-Control.html
0dayfindings.home.blog/2019/01/15/plc-wireless-router-gpn2-4p21-c-cn-incorrect-access-control/
www.exploit-db.com/exploits/46580/
www.youtube.com/watch?v=-cw04rOYREQ