A 5-year-old San Diego boy has outwitted the sharpest minds at Microsoft—he's found a backdoor to the Xbox.

Kristoffer Von Hassel managed to log in to his father's Xbox Live account. When the password log-in screen appeared, Kristoffer simply hit the space button a few times and hit enter.

Robert Davies tells KGTV-TV (bit.ly/1hmrTan ) that just after Christmas he noticed his son playing games he supposedly couldn't access.

Davies, who works in computer , says he reported the issue to Microsoft, which fixed the bug and recently listed Kristoffer on its website as a "security researcher."

A Microsoft statement says "we take security seriously" and thanks customers for highlighting issues.

It's not the Kristoffer's first triumph. At a year old, he bypassed a cellphone toddler lock by holding down the "home" button.