Warning: There's a major security flaw in Flash and you need to update immediately

Adobe company logos are seen in this picture illustration taken in Vienna July 9, 2013 (REUTERS/Leonhard Foege).

Stop us if you've heard this one before... dozens of times. A very serious security flaw has been discovered in Adobe Flash and millions of users are impacted. The zero-day vulnerability allows hackers to exploit the flaw and crash a user's system, or even take control of the system and steal private data.

It's one of the most serious types of flaws out there and in this case the vulnerability is being actively exploited by hackers. In other words, this isn't some tiny bug discovered by researchers and handled privately with Adobe behind closed doors. Hackers are using the security hole to attack users as you read this -- and now Adobe has released an update to patch the flaw.

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Here's what you need to know: All desktop versions of Adobe Flash player are affected, including builds for Windows, OS X and Linux. So basically, if you have a computer you need to install the update.

How can you update? You can use the update mechanism on your computer, or you'll find direct downloads and alternative options here: