Deloitte LLP has been targeted by a cyberattack that let hackers access data from an internal email platform.
The auditing and consulting firm said in a statement Monday that it’s currently informing the clients affected and has notified governmental authorities after it became aware of the incident.
Deloitte said “very few” clients were impacted, and has drafted outside help to review its security. The hack was first reported by The Guardian.
The email platform was stored on Microsoft’s Azure cloud platform, according to The Guardian. A spokeswoman from Microsoft declined to comment.
Deloitte offers a range of consultancy services to blue-chip clients. In June it revealed that three out of four oil and natural gas companies fell victim to at least one cyber attack last year.