I'm sure we all knew it was coming one day, but MS-CHAPv2 has officially been broken. https://www.cloudcracker.com/blog/2012/07/29/cracking-ms-chap-v2/ Many enterprise WPA and VPN links rely on MS-CHAPv2 (PPTP on VPNs, PEAPv0 on Wifi), so check out your equipment and its config.