So far no infected devices have been reported. Google is currently working on a fix and says it will issue a security update in October. This audio preview function exists within most versions of Android, so nearly every Android device is susceptible to this exploit. The malicious code can also be sent to a user's phone via public Wi-Fi. How secure is Android, really? / © ANDROIDPITĪ new Stagefright threat that targets Android phones through MP3 and MP4 files has been discovered. The code hides within the audio file and activates once users preview it or visit a page where the file is embedded.