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A remote code execution vulnerability in “limited, targeted attacks” appears directed at Microsoft Word 2010, said a Microsoft security advisory.

The vulnerability affects all supported versions of Word.

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Users’ systems can end up compromised if they open a specially crafted RTF file using an affected version of Microsoft Word, or they preview or open a specially crafted RTF email message in Microsoft Outlook while using Microsoft Word as the email viewer. Microsoft Word is the default email reader in Microsoft Outlook 2007, Microsoft Outlook 2010, and Microsoft Outlook 2013.

The exploitation of the vulnerability can result in the attacker gaining administrative user rights on the machine if the user uses an admin account.

Cyber Security

“In a web-based attack scenario, an attacker could host a website that contains a webpage that contains a specially crafted RTF file that is used to attempt to exploit this vulnerability. In addition, compromised websites and websites that accept or host user-provided content or advertisements could contain specially crafted content that could exploit this vulnerability,” the advisory said.

Users could end up on these sites via spam emails and IMs.

Microsoft has made available a Fix it tool that prevents the flaw to be exploited, at least until a permanent fix is issued.

If, for whatever reason, you don’t want to use the Fix it, there are workarounds for temporarily solving the issue (See under “Suggested Actions”).

Three people from the Google Security Team reported the vulnerability.

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