Network threats, router shown is not even mine

[REDACTED]

It says the router is infected, has a weak password, etc but it isn't mine, it's a neighbor's. Is there any way to remove/prevent it from showing up?

[Gopher John]

Are you connecting to the internet thru your neighbor's router? Is your neighbor's router in some way connected to your home network?  Those are the only two ways that your Avast install should be scanning that router.