Five Year Old discovers X-Box security vulnerability

As a matter of fact, that's exactly how it's done.

A suddenly excited Kristoffer showed Dad that when he typed in a wrong password for his father’s account, it clicked to a password verification screen. By typing in space keys, then hitting enter, Kristoffer was able to get in through a back door.

Kristoffers' father, who works in computer security, was one proud papa. His first reaction? "How awesome is that!" Davies said. “Just being 5 years old and being able to find a vulnerability and latch onto that. I thought that was pretty cool.”

Nice video at the link.  I recall #1 Son finding his first security vulnerability when he was four, but that's just me bragging on my boy.