CVE-2007-4600
The "Protect Worksheet" functionality in Mathsoft Mathcad 12 through 13.1, and PTC Mathcad 14, implements file access restrictions via a protection element in a gzipped XML file, which allows attackers to bypass these restrictions by removing this element.
Date published : 2007-10-18
http://www.securityfocus.com/archive/1/482341/100/0/threaded