Costco
Disclosed Sep 22, 201511 years agoConfirmed
What is known
| People affected | Not stated in the sources we have |
|---|---|
| Disclosed | Sep 22, 2015 |
| Discovered | Jul 17, 2015 |
| Happened | Jun 19, 2014 |
| Attack | Hacking |
| Data exposed | Not stated |
| Sector | Other · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| Washington Attorney General breach notice: Costcoatg.wa.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| Washington AGresidents of WA | Sep 22, 2015 | 29,425 |
History of this record
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (Washington AG), confirmed by Washington AG. Record counts are as reported. Not legal advice.