Possible Nexon Database Exploit?

i've been hacked before a couple times (once between aran and pypq and another in october of last year) and it had to have been through some sort of exploit because in my entire maple career the only maple sites i've ever been to are SP, SW, and BM. never went to a hacking site or anything like that, never account shared (i don't even have friends in real life that play or even play with buddies on line or in a guild for the most part), etc. both occurred during long periods of inactivity too. i logged onto my account months after the PIC system came out, set a PIC, and saw that I was hacked, so I had to have been hacked between 3-9 months prior, and the second time I only knew the date because my equips were MTS'ed and showed when and for how much they were sold. that happened during a six month hiatus sometime.