http://www.techradar.com/news/how-apple-google-and-microsoft-are-addressing-the-krack-wi-fi-vulnerability

Ah, WPA2 (Wi-Fi Protected Access): you've protected our Wi-Fi so well for so many years now.

Unfortunately, that illusion of safety was shattered earlier today when security researcher Mathy Vanhoef reported a vulnerability in the WPA2 handshake protocol that he's calling KRACK (for "Key Reinstallation Attack). Since almost every modern Wi-Fi device uses it, that effectively means every modern Wi-Fi compatible device is vulnerable. You'll find more information about it in our earlier coverage.