Hacking Updating new wii u

[s-arash]

hi

i just purchased wii u delux ntsc , its 1.0.3u now

is it safe to update? i mean is there any exploit in lower firmware which is patched in new firmwares like the 3ds exploit which is patched after 4.5 firmware

is the vWii exploits patched in new firmwares or they are still working?