Adobe warns for a critical securaty gap in the actually Flash Player version. At the moment only Windows User are affected. The problem is that the patch can't come until next week. The Zero-Day-vulnerability exist in all Flash-Versions until finaly the actually 28.0.0.137 among Chrome OS, macOS and Windows. Which Flash-Version do you have on your computer can you check on the Webpage from Adobe.
Ways to protect yourself
There is only one method to attack you about the vulnerability. They get access on your computer by doing you open an email with prepared office document. Then the attacker can take the controll over your computer and your system. So open only trusted email addenda!!
If you want to be on the save side you can disable Adobe until the Zero-day vulnerability is patched. A other method is to activate the protected-view settings in Office.