UIDAI also says Aadhaar is not compromised. The point is that nobody would try hacking the UIDAI database directly when there are far easier and cheaper ways to get to the data through other means because it’s linked with almost everything (depending on the state one lives in).
Also please read up on Rachna Khaira’s exposé (in Tribune) on how cheap and easy it was to get access to people’s information from the UIDAI database. That could also be called “hacking”, but the UIDAI won’t admit to that.
All this can be blamed on “bad actors” to avoid taking responsibility, but it’s clear that the system and its usage never went through a proper design and test implementation. But all along, there was (and continues to be) a lot of coercion to get people to register for it and link it everywhere.
FWIW, this topic makes me very frustrated.