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Auchan cybersecurity incidents and threat signals
auchan.fr
This company page brings together public reporting currently associated with Auchan. It reflects signals published by Shadow Tier and should not be read as a complete incident history.
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July 2, 2026
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Based on all published signals currently linked to Auchan. Affected countries come from victim data; the company country above remains a separate profile fact. Counts describe this reporting set, not overall incident prevalence.
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Auchan suffers cyberattack, data of over 500,000 loyalty customers stolen
On November 19, 2024, French retail giant Auchan announced it was the victim of a cyberattack that targeted personal data of over 500,000 customers enrolled in its loyalty program. The stolen data included names, first names, email addresses, postal addresses, phone numbers, family composition (if provided), dates of birth, loyalty card numbers, and loyalty pot amounts. Auchan confirmed that banking data, passwords, and loyalty card PINs were not affected. The incident was contained, and the company notified the French data protection authority (CNIL) and affected customers.
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What does the Auchan page include?
It combines a reviewed organization profile with all current published Shadow Tier signals explicitly linked to Auchan.
Does every mention of Auchan appear here?
No. A signal must contain a reliable company connection and meet the publication criteria; incidental or ambiguous mentions are excluded.
Why can the incident count change?
The page follows current published reporting. Counts change as new evidence is added, classifications are reviewed, or older signals leave the reporting window.