Zuckerberg Topless Photo Another Facebook Privacy Failure?

The picture making the rounds on the internet was allegedly originally posted on Facebook by another executive

A photo of a topless Mark Zuckerberg is burning up the Internet right now … immediately fueling suspicions of a major Facebook privacy screw-up. 

It's unclear when or where the pic was taken … showing the kid billionaire sans shirt with a couple of male friends. Mark's in pretty good shape for a computer nerd.