A CIS report titled "Information Security Practices of Aadhaar (or lack thereof): A Documentation of Public Availability of Aadhaar Numbers with Sensitive Personal Financial Information'. has claimed that millions of Indians could be the victim of a data breach.

While it's not clear whether this is an actual breach or potential breach, it highlights a weakness, or complete lack of IT Security controls in protecting the databases. 

This is a particular challenge for growing economies that are rapidly adopting digital technologies, but lack security and privacy frameworks to adequately support the infrastructure.