Microsoft will fix a record 49 vulnerabilities in its Patch Tuesday release next week that will involve 16 security bulletins affecting Windows, Internet Explorer, Office, and the .NET framework.

Four of the bulletins carry a "critical" rating, 10 are rated "important," and two are "moderate," according to the advisory.

They affect specifically Windows XP, Vista, Windows 7, Windows Server 2003 and 2008, Microsoft Office XP Service Pack 3, Office 2003 Service Pack 3, Office 2007 Service Pack 2, Office 2010, Office 2004 for Mac and 2008 for Mac, Windows SharePoint Services 3.0, SharePoint Server 2007, Groove Server 2010, and Office Web Apps.

Microsoft did not indicate whether two unpatched Windows holes that are being exploited by the Stuxnet worm will be fixed next week. Microsoft previously patched two other zero-day vulnerabilities in Windows the worm was using and said during last month's Patch Tuesday release that two more holes being used by Stuxnet needed to be plugged. Stuxnet spreads through the Windows vulnerabilities but was designed to target industrial control and critical infrastructure systems running Siemens software.

Full story: c|net