The Adobe Flash Player 10.1.53.64 update comes on the heels of last week's in-the-wild attacks against a zero-day hole in Adobe's Reader and Flash Player product. This patch fixes that vulnerability along with 31 other serious security problems.Adobe advisory outlines the severity:
Critical vulnerabilities have been identified in Adobe Flash Player version 10.0.45.2 and earlier. These vulnerabilities could cause the application to crash and could potentially allow an attacker to take control of the affected system.
The vulnerabilities in this patch batch affects all major operating systems: Adobe Flash Player 10.0.45.2 and earlier versions for Windows, Macintosh, Linux and Solaris; Adobe AIR 126.96.36.19930 and earlier versions for Windows, Macintosh and Linux.
To verify the Adobe Flash Player version number installed on your system, Adobe recommends that users access the About Flash Player page, or right-click on content running in Flash Player and select "About Adobe (or Macromedia) Flash Player" from the menu. If you use multiple browsers, perform the check for each browser you have installed on your system.
Here is a direct link to the Flash Player update.