It's scary that a new attack on wifi (Called Krack) has been found that may work on just about any wifi device. It's an attack on the protocol rather than any particular implementation and we don't have a more secure alternative available. It may be possible to fix it with a software update, but rolling that out everywhere is a big job.
The good news:
No security system is perfect and it's taken a long time for this one to be cracked. We have to rely on the good guys to give us a fix. When I started using computers they were all connected with a cable. I didn't have wifi at home until a lot later. Now we depend on it, especially with phones, tablets and all our other connected gadgets. They all ought to be using encrypted links, so maybe that will encourage more to do so.
Don't have nightmares.
Update: Security guru Bruce Schneier chips in
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