2008 — Hannaford Brothers Supermarket Chain: An estimated 4, 4.2M records 2008 4.2M records affected Share on X Technical writeup Mar 2008. An estimated 4.2 million credit and debit card numbers were stolen. Root cause Hacked Referenceshttps://www.networkworld.com/article/2284998/lan-wan/details-emerging-on-hannaford-data-breach.html