Google has issued a string of more than 20 patches for its Android Mediaserver code since August, proving that this is an Achilles heel for Android security. The fact that some of the flaws can be exploited simply by sending an MMS is concerning, as all an attacker needs to know is his or her victims phone number. Google says it has received no reports of the vulnerabilities being actively exploited, although of course often criminals only start to experiment with a flaw when details of the problem become public.”]