Four active exploits of a zero-day vulnerability in the browser exists. Microsoft will push out an out-of-cycle Windows patch to temporarily fix the critical Internet Explorer flaw. Microsoft has reported that most users are not affected by the bug, and the number of attacks has been limited. The malware may be linked to an ongoing attack on companies that has been dubbed “Nitro”, and was first discovered in October by Symantec. The German government has started telling its citizens to switch to other browsers.
Source: https://thehackernews.com/2012/09/exploit-released-for-internet-explorer.html