Heap-based buffer overflow in the browser plugin for PTC Creo View allows remote attackers to execute arbitrary code via vectors involving setting a large buffer to an unspecified attribute.
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.