Monday morning was not a great time to be an IT admin, with the public release of a bug that effectively broke WPA2 wireless security. As reported previously by ZDNet, the bug, dubbed “KRACK” — which stands for Key Reinstallation Attack — is at heart a fundamental flaw in the way Wi-Fi Protected Access II (WPA2) operates. The security protocol, an upgrade from WEP, is used to protect and secure communications between everything from our routers, mobile devices, and Internet of Things (IoT) devices, but there is an issue in the system’s four-way handshake that permits devices with a pre-shared password to join a network.