Most BlackBerry products do not use the targeted software, but vulnerable to the Heartbleed bug is Secure Work Space corporate email, BBM for iOS and BBM for Android. This past weekend, BlackBerry Senior Vice President Scott Totzke told Reuters that hackers could break into those apps using either a Wi-Fi connection, or via a carrier network. Still, Totzke said that thanks to BlackBerry's security technology, the risk of an attack was small and would have to be carried out during a very small window of opportunity.
So while BlackBerry says that the apps are safe to use now, the Canadian manufacturer is also planning on sending out security patches for both the iOS and Android version of its messaging app. BlackBerry did not say when these updates would be sent out, so if you do have an iOS or Android device with the BBM app installed, keep your eyes peeled for this security update.