If the mobile number of the person is administered in the portal, his ID details and centre from where he was vaccinated can be taken out.

Details could be accessed even with the Aadhar number.

Union IT ministry stressed that the data breached was previously stolen but not from COWIN portal.

Another arena of worry is that CoWIN has been integrated with UMANG (Unified Mobile Application for New-age Governance) and Aarogya Setu app.  

Union IT Ministry has asked CERT-In (Indian Computer Emergency Response Team) to investigate the matter.