Re: That is a strong password
There is a good description of the exploit here [you will need to translate]: http://blog.alguien.site/2014/02/hackeando-el-router-zte-zxv10-w300-v21.html
Basically, by default the router allows access to its 'management' ports from the Internet. Fortunately it would seem the management ports are behind the firewall and hence by using firewall rules, you can prevent direct remote access.