Adobe has released new versions of Flash that fix critical security issues for installations running on Windows, Macintosh, and Linux that could cause the application to crash and could potentially allow an attacker to take control of the affected system. Please update your systems soon.
Windows users should update to 11.9.900.170.
Macintosh users should update to 11.9.900.170.
Linux users should update to 188.8.131.522.
For Windows users using both Internet Explorer and another web browser (i.e. Firefox, Opera or Safari), you will need to install the update twice; once using Internet Explorer and again with the other browser(s). Internet Explorer uses ActiveX for Flash, and the other browsers use a plugin. (Internet Explorer 10 on Windows 8 includes a feature to automatically update Flash.)
Note that Adobe has updates available for Flash on Android for users who have Android devices with Flash, as well as Adobe AIR for products that use that technology.
For more information and links to software downloads, see http://helpx.adobe.com/security/products/flash-player/apsb13-28.html, and for direct links to software downloads see http://www.adobe.com/products/flashplayer/distribution3.html