It depends. With online mode disabled, it is extremely difficult to "hack" CattleDB, because
in order to do so, the hacker would need to be connected to your wifi network. However, if
network or host computer become compromised, it would be very easy to access your records.
Ensure that your network, and your host computer are secure.
It's also worth noting that there are some security concerns with online mode specifically.
While it's unlikely that a hacker would be able to bypass the login, it is possible for your
login information and your records to be intercepted in transit since, due technical
CattleDB uses HTTP instead of HTTPS (What's the difference?
However, if you make sure to only use CattleDB on trustworthy networks (no restraunts,
hotels, public networks), it is unlikely that such an attack will occur.