If you use Flash on your Mac, you’ll probably want to download this new security update.

Adobe released today what it’s calling a “critical” update for Flash Player on both Mac and Windows. The update fixes a vulnerability which could reportedly give hackers complete control of your system, so it’s probably worth giving it a download.

Adobe has released security updates for Adobe Flash Player 12.0.0.43 and earlier versions for Windows and Macintosh and Adobe Flash Player 11.2.202.335 and earlier versions for Linux. These updates address a critical vulnerability that could potentially allow an attacker to remotely take control of the affected system. Adobe is aware of reports that an exploit for this vulnerability exists in the wild, and recommends users update their product installations to the latest versions.

These updates resolve an integer underflow vulnerability that could be exploited to execute arbitrary code on the affected system.

Adobe thanked two researchers over at Kaspersky Lab for having discovered the issue.