Critical vulnerabilities have been identified in Adobe Flash Player version 10.0.32.18 and earlier. These vulnerabilities could cause the application to crash and could potentially allow an attacker to take control of the affected system.

Adobe recommends users of Adobe Flash Player 10.0.32.18 and earlier versions update to Adobe Flash Player 10.0.42.34. Adobe recommends users of Adobe AIR version 1.5.2 and earlier versions update to Adobe AIR 1.5.3.

Read more: http://www.adobe.com/support/security/bulletins/apsb09-19.html