WannaCry ("the attack") didn't target Windows 10 installations (probably since most Win10 users have updates enabled), but Windows 10 is still vulnerable without the patch.
Again, where is the source? I seriously doubt that the worm author would let go such a profitable target if they can infect Windows 10. According to this: https://www.netmarketshare.com/operating-system-market-share... Windows 10 has almost 4 times users than XP (and supposedly the gap is growing larger)
The difference would be that Win 10's forced updates mean nearly every Win 10 user is patched. It would be a much less successful target (though still a target > 0).
