79.5% of the 2.5 million users of Trusteer s Rapport security service run a vulnerable version of Adobe Flash. The company has also criticized Adobe by insisting that their update mechanism does not meet the requirements of a system that is used by 99% of users on the Internet and is highly targeted by criminals However, the company is praising the update mechanism of Chrome and Firefox, whose silent updates close the window of opportunity for malicious attackers to take advantage of.
Source: https://threatpost.com/80-web-users-running-unpatched-versions-flashacrobat-082509/72945/