If that doesn't work, you should be able to find a factory reset button. Look for a hole you can stick a paper clip in, and power cycle with the button depressed.
Once you do that, call your ISP and ask for the default password.
Luckily, every other hop you traverse across the internet is untrustworthy too, so having a bad router shouldn’t worry you. Treat your home wifi like you treat Starbucks wifi.
