The ZTE ZXV10 W300 router with firmware W300V1.0.0a_ZRD_LK has a default password of admin for the admin account, which makes it easier for remote attackers to obtain access via unspecified vectors.
https://osandamalith.wordpress.com/2014/06/15/zte-wxv10-w300-multiple-vulnerabilities/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2014-3950
http://www.exploit-db.com/exploits/33803
http://packetstormsecurity.com/files/127129/ZTE-WXV10-W300-Disclosure-CSRF-Default.html