A third-party email vendor for the Ontario Science Centre suffered a data breach exposing some PII of 174,000 of the Centre’s members, donors and customers.

The Centre learned of the breach on August 16 when the educational center’s outside email marketing firm Campaigners reported that sometime between July 23 and August 7 an unauthorized person used a former worker’s credentials to download the information, IT World Canada reported.

The Centre then informed the Ontario Information and Privacy Commission of the incident on October 3.

The database accessed contained content related to the Centre’s mailings, newsletters and invitations so exposed names and email addresses.