Microsoft released six security bulletins today three rated Critical and three rated Important. Today s release is important because patches were released for two recent 0-day attacks a QuickTime file parsing vulnerability and the recently announced Directshow vulnerability. Both vulnerabilities are reported as being actively exploited on the Internet. The Operating System patch (MS09-029) is particularly nasty and can execute when a user views an evil web page, email, or Office document. Clicking on an evil hyperlink could allow the attacker to execute code on your system.
Source: https://threatpost.com/inside-microsofts-july-security-patch-batch-071409/72909/