> You do realize there's a bajillion non-networked apps in existence? Word processors, excel, editors/IDE's, system tools (esp monitoring/backup), media players

> You do realize there's a bajillion non-networked apps in existence? Word processors, excel, editors/IDE's, system tools (esp monitoring/backup), media players that don't download stuff, compression libraries, MATLAB-style tools for numeric analysis, and so on. All of them parse potentially untrusted inputs. They don't have to be directly network connected to be a security risk. Just pick the first example: A word processor. It is not a security risk only if you can guarantee that you'll only ever open documents that you created yourself. If you ever use it to open documents you got from someone else it needs to take security into consideration.