Happy Patch Tuesday! Microsoft is kicking off the year with seven new security bulletins. There are five rated as Important, and two rated as Critical—but one in particular that has security experts concerned.

Andrew Storms, director of security operations for nCircle, stresses that MS13-002 will be a popular target for attackers and should be the top priority. “If you can’t do anything else right away, at least patch this one post haste. This critical XML bug affects every version of Windows in one way or another because XML is used by a wide range of operating system components.”

Tyler Reguly, technical manager of security research and development at nCircle agrees. “If you have to apply only one patch, pick this one and pay close attention to the number of products affected.”

Of course, the XML flaw is only one of the Critical security bulletins this month. The other one is MS13-001, which deals with a flaw in the print spooler service on Windows 7 and Windows Server 2008.

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