Heap-based buffer overflow in the CDrawPoly::Serialize function in fxscover.exe in Microsoft Windows Fax Services Cover Page Editor 5.2 r2 in Windows XP Professional SP3, Server 2003 R2 Enterprise Edition SP2, and Windows 7 Professional allows remote attackers to execute arbitrary code via a long record in a Fax Cover Page (.cov) file. NOTE: some of these details are obtained from third party information.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12689
http://www.us-cert.gov/cas/techalerts/TA11-102A.html