Adobe has released security updates for Adobe Flash Player 18.104.22.168 and earlier versions for Windows and Macintosh and Adobe Flash Player 22.214.171.1246 and earlier versions for Linux. These updates address vulnerabilities that could potentially allow an attacker to take control of the affected system. Adobe is aware of reports that an exploit for CVE-2014-0502 exists in the wild, and recommends users update their product installations to the latest versions.
You can find some tips regarding Flash here;
More information: http://helpx.adobe.com/security/products/flash-player/apsb14-07.html