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Microsoft Fixes Record 49 Holes, Including Stuxnet Flaw

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In a record Patch Tuesday, Microsoft released updates today for Windows, Internet Explorer, and the .NET framework that feature fixes for 49 holes, including one being exploited by the Stuxnet worm.

Microsoft recently fixed two of the four unpatched holes being used by Stuxnet to spread to Windows-based machines. The malware ultimately targets systems running software from Siemens that is used in critical infrastructure operations. Today's release plugs one (MS10-073) of the remaining two holes and the company said in a blog post that the final hole will be addressed in an upcoming security bulletin.

Meanwhile, Microsoft provided a priority list for the 16 bulletins being released, which fix 6 holes that are rated "critical." Four vulnerabilities are singled out because there are likely to be exploits developed for them, according to a Microsoft blog that assesses the risks of the various vulnerabilities.

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