Zendesk, a customer service software provider, announced Wednesday that up to 10,000 of its support and chat accounts may be impacted by a November 2016 data breach. Zendesk learned of the breach on September 24, 2019, after it was alerted by a third-party, almost three years after the breach took place.

As a precaution, Zendesk will begin resetting passwords for users that registered before November 2016. Zendesk has numerous high-profile clients—Uber, Airbnb, and Squarespace, to name a few—that could have been affected; alarmingly, Zendesk suffered a similar cyber incident in February 2013, impacting notable companies including Twitter and Pinterest.