They don't give out info like that because they really don't know. How would they or anyone else know how a CC was hacked, unless they directly asked the caught hacker.I was thinking about a time the bank contacted me to say the card had been compromised and they were sending a new one. I called or e-mailed to ask what company had been hacked, thinking I would avoid using the new card number there. The reply was something like "We don't give out that information."
My CC has been hacked 3 times in the last 5 years, and nobody including my CC company knows, I asked them. All they try to do is recover the fraudulent charges from the places the thief used the CC to charge stuff.