New vulnerability in Microsoft Word has been reported.
More details available at SANS Internet Storm Center Diary:
http://isc.sans.org/diary.php?storyid=1925 

Microsoft has confirmed that it is a different vulnerability than this issue reported earlier this week:
http://www.microsoft.com/security/msrc/incident_response.mspx 

Link to MSRC entry:
http://blogs.technet.com/msrc/archive/2006/12/10/new-report-of-a-word-zero-day.aspx 

Word 2002, Word 2003 and Word Viewer 2003 are reportedly affected.
Word 2002 is reportedly immune.

Vulnerability is being exploited too (i.e. typical targeted attacks).

- Juha-Matti