Oh most certainly. However, I'm going to say there is at least one serious security flaw out and published every release (the currently used one by jail breaker

Oh most certainly. However, I'm going to say there is at least one serious security flaw out and published every release (the currently used one by jail breakers) that can be used access usually. Generally speaking, you can just use that one for worms, rootkits, etc if the web is your attack vector (not all of them are that easy to exploit unaware, but many of them are).