The Uniscribe (aka new Unicode Script Processor) implementation in USP10.DLL in Microsoft Windows XP SP2 and SP3, Server 2003 SP2, Vista SP1 and SP2, and Server 2008 Gold and SP2, and Microsoft Office XP SP3, 2003 SP3, and 2007 SP2, does not properly validate tables associated with malformed OpenType fonts, which allows remote attackers to execute arbitrary code via a crafted (1) web site or (2) Office document, aka "Uniscribe Font Parsing Engine Memory Corruption Vulnerability."