Xp No Longer Patched, Open Exploits?

since xp is longer being patched by microsoft this should mean its very vulnerable now to remote exploits correct? are there any "zero-day" exploits that work on xp that should be forever available. it seems to me that xp being left in the cold my M$ and that XP still has a pretty large foothold this would be something great if your a hacker. But everything i find just points to netapi or dcom exploits which have been patched therefor any system that has all m$ patches is not vulnerable anymore. Especially if the system has most ports closed. exacmle xp machine with ports 135,139,445 open but all remote exploits are patched some time ago so any system that took updates in the past year are secured. Surely there has to be some remote exploit that will forever pwn an xp box right, or only those elite hackers that found the hole themselves and dont release