Citi
Disclosed Jun 3, 201115 years ago360,083 affectedUnverified
Hackers view data on 360,083 Citi credit card accounts via website flaw
Citigroup said hackers compromised its card account management website in May 2011 and viewed names, account numbers and contact details for 360,083 North American credit card accounts. Citi began mailing notification letters on June 3, 2011.
What is known
| People affected | 360,083 (as reported by the organization) |
|---|---|
| Disclosed | Jun 3, 2011 |
| Discovered | May 2011 |
| Attack | Hacking |
| Data exposed | Names, Financial, Emails |
| Sector | Finance · US |
| Status | Unverified: not yet confirmed by an official notice, a filing or the organization |
Sources
| Source | |
|---|---|
| Citigroup reveals breach affected over 360,000 cardscomputerworld.com · News | News |
Notices filed
| Where | Filed | People |
|---|---|---|
| Researchtotal | Jun 3, 2011 | 360,083 |
Other breaches at Citi
| Breach | Affected | ||||
|---|---|---|---|---|---|
| Disclosed Mar 28, 2013Mar 28, 201313 years ago | Mar 28, 201313 years ago | Not stated | Tech | Confirmed | Unknown |
| UPS loses CitiFinancial backup tapes with 3.9 million customers' dataJun 6, 200521 years agoLost or stolen deviceUnverified | Jun 6, 200521 years ago | Lost or stolen device | Finance | Unverified | 3.9M |
History of this record
- 2026-09-25 · added · seed source
First seen 2026-09-25 (Research). Record counts are as reported. Not legal advice.