Adobe released a fix for its Flash Player yesterday that mitigates 5 different attack vectors. Some of the flaws could allow a malicious attacker to take over a compromised system merely by enticing a user to a page with a compromised .swf (Flash) file.
Flash player 10.0.12.36 and earlier for:
Windows, Mac OSX, Linux
Adobe Security Bulletin:
Patch for v. 10
Patch for v. 9
Make sure to patch each browser that you have installed. You can do this by visiting the patch link each time for each browser.