Adobe has patched a number of critical vulnerabilities in Flash that could be used by attackers to take over affected systems.

The bugs are severe enough that Microsoft, which distributes Flash with Windows, has also warned its customers of the issue. Mac OS X versions are also affected.

Attackers could theoretically exploit the bugs by tricking a user into loading a maliciously encoded Flash movie file, which would have a .swf extension, Adobe said in its advisory.

The vulnerabilities can be found in Flash Player version 8.0.22 or earlier; the Breeze Meeting, version 5.1 and earlier; as well as the Shockwave player, version and earlier.