A security vulnerability exists in Microsoft Word that could allow malicious code execution. This vulnerability exists due to to the way Word checks the length of a data value (Macro names) embedded in a document. If a specially crafted document were to be opened it could overflow a data value in Word and allow arbitrary code to be executed. If successfully exploited, an attacker could then take the same actions as the user had permissions to carry out, such as adding, changing or deleting data or files, communicating with a web site or formatting the hard drive.
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