08/05/2011 11:42 am ET | Updated Oct 05, 2011

Hackers Can Use Text Messages to Break Into Locked Cars

A security consultant has identified a serious security glitch that allows him to break into cars -- via text message.

Don Bailey, a consultant with iSEC Partners, uses a mobile trick to hack into cars' security systems. Because many systems receive firmware updates through SMS messages, it leaves them vulnerable to abuse.

In an interview with CNN, he warned that the same hack he uses to unlock cars could be used for even more damaging attacks against the power grid and water systems.