What can I do if this happens with my Fritz.box router?
What I mean is, I first asked Alexa for music, and then she said your Wi-Fi password had been changed. Then I went to my router, all the lights were off, and all the cables were plugged in. I tested that, and a completely different page appeared. And then it seemed to me: Does this look like a hacker attack on Fritz.box? What should those affected do? If it's a data leak, the page that appeared instead of fritz.box is tp-linkrepeater. (net) is that a hacker page?
Yeah, that sounds like a hacker attack. Your Wi-Fi password could have been changed and the router settings could have been manipulated. Here are the steps you should take:
The tp-linkrepeater(.)net page is not necessarily a hacker page, but could mean that your network has been compromised. Get the best professional help.
Could also be that the OP has a TPlink repeater
How are you going to run an AV on such a nem router?
The only thing that makes sense is if you want the least stress.