A few days ago, Adobe revealed the details of a new zero-day vulnerability in Flash. This vulnerability, which is being exploited via a Flash (.swf) file embedded in a Microsoft Excel (.xls) file and delivered as an email attachment, can cause a crash and/or potentially allow an attacker to take control of the affected system.
The vulnerability is also present in the Authplay.dll component that ships with Adobe Reader and Acrobat X (10.0.1) and earlier 10.x and 9.x versions of Reader and Acrobat for Windows and Macintosh operating systems.
Adobe have a fix for this problem which it plans to release at the beginning of next week. However Google has pipped Adobe to the post and released the fix in Chrome ahead of the official Adobe release.