USR IOT 4G LTE Industrial Cellular VPN Router 1.0.36 Remote Root Backdoor

The USR IOT industrial router is vulnerable to hard-coded credentials within its Linux distribution image. These sets of credentials are never exposed to the end-user and cannot be changed through any normal operation of the device. The 'usr' account with password 'www.usr.cn' has the highest privileges on the device. The password is also the default WLAN password.