Attack: Microsoft RDP CVE-2012-0002 3

Good Morning - A whole bunch of our users received  this message:

[SID 25610] Attack: Microsoft RDP CVE-2012-0002 3 detected.

I have read your info page on the error but can you explain what it means in layman's terms?

Does it mean everyone got successfully attacked?  or did they try and it got blocked?  most users who received the message have up tp date virus defs.

thanks