TORONTO: Three hackers say they have exploited a vulnerability in Research In Motion's PlayBook tablet to gain root access to the device, a claim that could damage the BlackBerry maker's hard-won reputation for security.

Root access means a user has permission to alter any file or program on a device and can control hardware functions.

In a response to queries, RIM said it is investigating the claim, and if a "jailbreak" is confirmed will release a patch to plug the hole. Read more