You would remeber the fail0verfl0w guys that were the first one in hack the Wii U, however they never would share this in public because for them there is no real interest in Wii U hombrew scene (example create a secure homebrew enviorement and prevent piracy).Time has passed and from nowhere guys from Wii U Hax found an exploit to access to Wii U hardware, even more they were able to dump the file "bootrom.bin" which is the first file the system access to boot.More interesting the hashes match the ones published by team fail0verfl0wAccording to Marionumber1 (one of the members, or testers?) the exploit works in Wii mode, from there you get access to Wii U hardware, not sure if it's full access though. It seems bootrom works the same way as boot0 in Wii, it can't be patched by Nintendo through updates, the only way they can fix it is hardcoding the hadware itself (new Wii U model)