Apple Inc.'s latest iPhone comes with a virtual personal assistant, Siri, that responds to spoken commands to write emails, text messages, place phone calls and more. But by default, it does not shut off when the phone is locked, making it possible for an unauthorized user to access sensitive information.

From a locked phone, a user can use Siri's spoken commands for many functions, including searching information on stored contacts, Business Insider reported Thursday. In one instance, it was possible to find a contact's Social Security number, the article said.

Apple built in the ability to disable Siri when the phone's other functions are locked, but "Siri's default setting is to ignore this," the article said. "It's not until you change the setting that Siri falls into line with the idea of being a locked phone."