Insecure Permissions vulnerability in Sichuan Tianyi Kanghe Communication Co., Ltd China Telecom Tianyi Home Gateway v.TEWA-700G allows a local attacker to obtain sensitive information via the default password parameter.
https://github.com/te5tb99/For-submitting/wiki/China-Telecom-Tianyi-Home-Gateway-TEWA%E2%80%90700G