I woke up to find my Wii U updating, I let it go and now I'm running 5.0.0. I was planning in hacking vWii, but I'm not sure if it is safe at this point. Any info on this?

I woke up to find my Wii U updating, I let it go and now I'm running 5.0.0. I was planning in hacking vWii, but I'm not sure if it is safe at this point. Any info on this?