Microsoft issued a security advisory about the vulnerability, related to a weakness in the PEAP-MS-CHAP v2 protocol that’s used for WPA2 authentication in Windows Phone. If you have users with Windows phones, be sure they’re educated about this issue.
You can read more here:
http://www.zdnet.com/windows-phones-open-to-hackers-when-connecting-to-rogue-wi-fi-7000019037/