If you are still using admin / admin (or any of the defaults listed above), you are at a high risk of being hacked. Botnets (like Mirai) constantly scan for 192.168.1.1 and try default username and password combinations.
The IP address 192.168.1.1 serves as the default gateway for many local area networks (LANs), allowing users to access the router's web-based interface. This interface provides a range of functionalities, including:
Locate the small "Reset" button (usually a tiny hole) on the back of the router. Use a paperclip to press and hold it for 10 to 15 seconds while the router is powered on. This wipes all custom settings—including your Wi-Fi name and password—and returns the device to its factory defaults. You can then log in using the standard "admin/admin" credentials.