French retailer Auchan is informing that some sensitive data associated with loyalty accounts of several hundred thousand of its customers was exposed in a cyberattack.

The company is sending data breach notifications to customers affected by the incident.

"We are writing to inform you that Auchan has been the victim of a cyberattack. This attack resulted in unauthorized access to certain personal data associated with your loyalty account," reads the retailer's notification.

According to the sample of the notice, the data exposed in the attack includes full names, title and client status, postal address, email address, phone number, and loyalty card number.

The retailer underlines that bank data, passwords, and PIN numbers have not been impacted.

In a statement for French media , a

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