What happened in the Auchan cyberattack?

French multinational retail group Auchan reported a cyberattack that compromised the personal data of over 500,000 customers enrolled in the company's loyalty program.

When did the Auchan data breach occur?

The cyberattack occurred on November 19, 2024.

How many customers were affected by the Auchan data breach?

Over 500,000 customers enrolled in Auchan's loyalty program were affected by the data breach.

What personal data was compromised in the Auchan breach?

The compromised customer information included full names and titles, email addresses, postal addresses, phone numbers, date of birth, loyalty card numbers, family composition details (when provided), and client status information.

Is the Auchan breach connected to other recent data breaches in France?

The data breach at Auchan follows similar disclosures made by other large entities in France, including Air France and KLM, Orange, and Bouygues Telecom, which may indicate that the breach is through a compromised Salesforce instance.

What was the nature of the attack on Auchan?

The nature of the attack has not been disclosed by Auchan, though it may be connected to a compromised Salesforce instance based on similar recent breaches affecting other French companies.

Incident

Retail group Auchan reports data breach affecting over 500,000 customers

Q: What is Auchan and how big is the company?

Auchan is a major French multinational retail group with over 2,100 branches across 13 countries in Europe and Africa.

Q: What actions did Auchan take after the data breach?

Auchan notified the French Data Protection Authority (CNIL) about the incident and is sending data breach notifications to affected customers.

published: Aug. 25, 2025

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French multinational retail group Auchan reports a cyberattack that occurred in November 19, 2024 and compromised the personal data of over 500,000 customers enrolled in the company's loyalty program.

Auchan operates as a major French multinational retail group with over 2,100 branches across 13 countries in Europe and Africa.

The compromised customer information included:

Full names and titles
Email addresses
Postal addresses
Phone numbers
Date of birth
Loyalty card numbers
Family composition details (when provided)
Client status information

The nature of the attack is not disclosed. The company notified the French Data Protection Authority (CNIL) about the incident and is sending data breach notifications to affected customers.

Retail group Auchan reports data breach affecting over 500,000 customers

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