http://www.boston.com/business/personaltech/articles/2007/07/23/iphone_vulnerable_to_hackers/
The researchers, working for Independent Security Evaluators, a company that tests its clients' computer security by hacking it, said that they could take control of iPhones through a WiFi connection or by tricking users into going to a website that contains malicious code.
The hack, the first reported, allowed them to tap the wealth of personal information the phones contain.