The (1) QProGetNotebookWindowHandle and (2) Ordinal132 functions in QPW160.dll in Corel Quattro Pro X6 Standard Edition 16.0.0.388 and earlier allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted QPW file.
archives.neohapsis.com/archives/bugtraq/2013-03/0048.html
osvdb.org/91039
osvdb.org/91040
packetstormsecurity.com/files/120713/Corel-Quattro-Pro-X6-Standard-Edition-NULL-Pointer-Dereference.html
www.securityfocus.com/bid/58386
exchange.xforce.ibmcloud.com/vulnerabilities/82707
www.htbridge.com/advisory/HTB23112