Zendesk, a cloud-based customer service software used by over 65 million people has been hacked.

The firm yesterday February 21 announced the hack saying information belonging to three of its top class clients was accessed.

Reports in media say the three top class clients include Twitter, Tumblr and Pinterest.

The firm said, “We’ve become aware that a hacker accessed our system this week. As soon as we learned of the attack, we patched the vulnerability and closed the access that the hacker had. Our ongoing investigation indicates that the hacker had access to the support information that three of our customers store on our system. We believe that the hacker downloaded email addresses of users who contacted those three customers for support, as well as support email subject lines. We notified our affected customers immediately and are working with them to assist in their response.”

Zendesk added that its investigation revealed that no other customers were affected.


Like Facebok, Twitter, WSJ, Apple and many others affected by the new series of hacks in the US, Zendesk says it is working with security authorities to bring those involved to book.