You probably changed your Wi-Fi password the day the technician left your house. But did you change the administrator password?
If you are using a router from ISPs like Huawei, ZTE, or many GPON ONT devices, there is a backdoor account you might not know about: . telecomadmin password change
Many ISP routers use the infamous telecomadmin superuser account with a known default password. Here is why you need to change it immediately and the exact steps to secure your network. The Dirty Secret of ISP Routers You probably changed your Wi-Fi password the day
Do not use password123 . Use a password manager to generate a 16-character string. Example: Purple$Duck42#Sky! Many ISP routers use the infamous telecomadmin superuser
Click Save/Apply. The router will likely kick you out immediately. You will need to log back in using telecomadmin + your new password . A Critical Warning: The TR-069 Trap
Why Leaving Your Router’s ‘telecomadmin’ Password Default is a Security Nightmare (And How to Change It)