Adobe issued a security bulletin on 3/10/16 for an emergency update for Flash. This patches a number of bugs, including at least one critical bug that was being exploited that would allow an attacker to run hostile code on your computer. Affected products include the Flash Desktop Runtime for Windows, Linux, and Mac; Flash players for most browsers; and AIR for Android. Of course, this does not affect any iOS device because Steve Jobs famously banned Flash from that platform. This Adobe security bulletin has more details.