While some security specialists are already crying that this has opened the Xbox to a lot of potential. From what we understand Microsoft still has to authorize the console on their end, so we are not sure that the leak is as big as some are making it out to be from a security perspective.
SDK leaked for Xbox One
Will it get unsigned code running
The hacker group H4LT is claiming responsibility for leaking the Xbox One SDK documentation. The SDK offers significant documentation about the hardware and software used on the Xbox One. It is unknown if it will help get unsigned code running on the console.