---
title: French Retail Giant Auchan Hit by Major Cyberattack Exposing Hundreds of Thousands of Customers
description: Auchan's loyalty database breach exposes customer data, sparking warnings of phishing attacks. Financial info remains safe, but concerns persist.
canonical_url: https://codekeeper.co/ticker/auchan-customer-data-breach-august-2025
---

[Cyberattacks](https://codekeeper.co/ticker/tag/cyberattacks)

# French Retail Giant Auchan Hit by Major Cyberattack Exposing Hundreds of Thousands of Customers

Auchan's loyalty database breach exposes customer data, sparking warnings of phishing attacks. Financial info remains safe, but concerns persist.

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By Content Team Aug 26, 2025

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French retail chain Auchan announced on August 21, 2025, that hackers breached their customer loyalty database, exposing personal information from "several hundred thousand" accounts. The stolen data includes names, email addresses, phone numbers, postal addresses, and loyalty card numbers. Fortunately, financial data, passwords, and reward balances remained secure thanks to the company's segmented database architecture. Auchan immediately notified customers and France's data protection authority (CNIL), warning about potential phishing attacks using the stolen contact information. This marks Auchan's second major breach in nine months, suggesting persistent vulnerabilities in their systems that need urgent attention. **Source:** [Cybersecurity News](https://cybersecuritynews.com/french-retailer-auchan-cyberattack/)

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