Vulnerability
This is the foremost problem with account abstraction. Smart contract users’ funds might get breached with hackers siphoning the funds off.
Lack of Understanding
Since account abstraction is still in the early stages, there need to be more educational resources that help guide users on how to set up an account or even properly carry out transactions.
Data and Privacy Breach
Users data can be accessed if security measures to prevent such an event properly aren’t put in motion by developers.