PC World reports that a new, critical bug in Adobe's Flash Player is being exploited by attackers. The bug affects Adobe Flash Player version 10.0.45.2 and earlier on all operating systems, including Windows, Macintosh and Linux. It is also found in the latest versions of the widely used Reader and Acrobat software, Adobe said. "There are reports that this vulnerability is being actively exploited in the wild against both Adobe Flash Player, and Adobe Reader and Acrobat," Adobe said in its security advisory. When exploited, the flaw can cause Adobe's software to crash, but it can also give attackers control of the computer, Adobe said.

Note, you cannot simply update your player, as the current version is vulnerable. You must install the 10.1 release candidate. Click here for the Flash uninstaller (use that first) and the 10.1RC installer.