https://www.theguardian.com/technology/2017/dec/08/apple-fixes-homekit-bug-remote-unlocking-doors-security-flaw-iphone-ipad-ios-112-smart-lock-home

Security flaw in latest iPhone and iPad iOS 11.2 software meant hackers could potentially gain remote control of lights, cameras and locks in smart homes

Apple has been forced to fix a security hole within its HomeKit smart home system that could have allowed hackers to unlock users’ smart locks or other devices.