Microsoft has issued a Security Advisory (2887505) detailing a zero day vulnerability that affects all versions of Microsoft Internet Explorer. While it appears that this attack is currently only exploiting Windows XP and Windows 7 in a limited geographical region, hackers will be able to examine the patch and may produce a more wide spread attack.
Strongly recommend that you begin installing the Microsoft “Fix it” described in the Advisory.
http://technet.microsoft.com/en-us/security/advisory/2887505
http://www.trusteer.com/blog/trusteer%E2%80%99s-exploit-prevention-stops-attacks-targeting-new-ie-zero-day-cve-2013-3893
https://community.qualys.com/blogs/laws-of-vulnerabilities/2013/09/17/september-2013–new-ie-0-day
http://www.symantec.com/connect/blogs/new-internet-explorer-zero-day-found-targeted-attacks
