Epsilon

Disclosed Apr 1, 2011Unverified

Email marketing firm breach exposes customer names and emails of many brands

Epsilon, which sent marketing email for about 2,500 companies, said an unauthorized entry into its email system exposed customer names and email addresses; clients including JPMorgan, Citigroup, Best Buy and Capital One warned customers.

What is known

People affected	Not stated in the sources we have
Disclosed	Apr 1, 2011
Attack	Hacking
Data exposed	NamesEmails
Sector	Tech · US
Status	Unverified: not yet confirmed by an official notice, a filing or the organization

Sources

Newstheguardian.com

Epsilon email hack: millions of customers' details stolen

Notices filed

TotalApr 1, 2011

ResearchCount not stated

History of this record

Added2026-09-25

First recordedby seedSource

First seen 2026-09-25 (Research). Record counts are as reported. Not legal advice.

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