A remote code execution vulnerability exists within Microsoft Word which may allow for a remote attacker to execute arbitrary code under the context of the logged in user. This vulnerability requires user interaction. In a web-based scenario (e-mail, Web site), a user would still have to open a file manually, as it would not be auto-opened.
It seems as though Microsoft has known about this vulnerability since November 21st, when it originally was assigned CVE-2006-5994 by Mitre.
NOTE: This information is gathered from the referenced Microsoft Advisory (929433). eEye Research is currently searching for an exploit sample to investigate the vulnerability further and will update this entry soon thereafter.
Office 2004 for Mac
Office v.X for Mac
Word Viewer 2003
BeyondTrust Prevention and Detection:
BeyondTrust's Blink® Personal Edition protects from this vulnerability.
BeyondTrust's Blink® Professional Edition protects from this vulnerability.
BeyondTrust's Retina® Network Security Scanner scans devices to detect for this vulnerability.
Microsoft Security Bulletin (929434)
Currently there is no mitigation for this vulnerability.
Links:Microsoft Security Advisory (929433): Vulnerability in Microsoft Word Could Allow Remote Code Execution