Amid the worldwide hoopla over the new Xbox, a hidden vulnerability that could allow anyone to break into Xbox accounts just by having a console. A vulnerability, uncovered by a 5-year-old.

When Kristoffer von Hassel is playing his Xbox, his feet donít touch the ground.

His words are sometimes hard to understand, but something he just did sent a message, loud and clear to some of the smartest techies at Microsoft.

Just after Christmas, Kristofferís parents noticed he was logging into his fatherís Xbox Live account and playing games he wasnít supposed to be.

This is video shot soon after dad asked Kristoffer how he was doing it.

A suddenly excited Kristoffer showed dad when he typed in a bad password, it clicked to a password verification screen.

And by typing in space keys, then hitting enter ó a back door in.

Kristofferísí father, who works in computer security, was one proud papa.