Security researchers from Trend Micro have discovered two new attack scenarios that could trigger Stagefright vulnerability without sending malicious multimedia messages. The new attack vectors required user interaction to either download the malicious Android app or land the victims on the specially crafted web page. The latest attacks cause more severe impact on the targeted Android devices, and also can be used to target large number of audience. Google has delivered a patch for the vulnerability but given the shaky history of handset manufacturers and carriers rolling out security patches, it is not known how long the companies will take to update vulnerable Android devices.
Source: https://thehackernews.com/2015/07/how-to-hack-android-phone.html