The company says in a security bulletin on its website that the update addresses the critical security vulnerability that could allow an attacker to gain control and take over an affected system. Even as Adobe’s patch is underway for the bug, hackers have been taking advantage of this vulnerability with systems running Internet Explorer for Windows 7 and Firefox on Windows XP to take control of users system for malicious purpose. Adobe has countered that by releasing 18.0.0.194 build of Flash Player and is urged all users to update immediately. The latest build of Flash is available via Adobe’s Download Center, although all users should also be prompted via the software’s built-in update mechanism. As regards to OS X, Apple had earlier blocked old versions of Flash Player in Safari through a web plug-in blocking mechanism in OS. It is reported that Apple will take similar action and block all versions of Flash Players prior to the above released 18.0.0.194 build in order to protect its OS X users. Regarding the security flaw that build 18.0.0.194 addresses, Adobe wrote the following in a bulletin on its website: You can download the latest version of Flash here. Adobe is aware of reports that CVE-2015-3113 is being actively exploited in the wild via limited, targeted attacks. Systems running Internet Explorer for Windows 7 and below, as well as Firefox on Windows XP, are known targets.