Tim Murtaugh wrote on A List Apart about the latest Flash zero day vulnerability.
Flash gets updated a lot, often for security purposes. What usually happens is a security firm, or a hacker looking for a bounty, or Adobe itself will find a vulnerability, and the Flash team will quietly patch their software before the exploit becomes widely known. This time, the exploit is already out there, and is quickly making its way into malware tools.
So, I assume you’re already multi-tasking and disabling Flash in your browsers. (Here’s how to disable Flash in Chrome. And Safari. And Firefox. And IE.)
I recommend a better practice. Don’t even install Flash.