Breachesby IbisCyrusOne
Disclosed Oct 7, 2026yesterday373,460 accountsUnverified
In August 2026, data centre operator CyrusOne was the target of a ShinyHunters "pay or leak" extortion attempt . The group subsequently published data allegedly obtained from the company, which included 373k unique email addresses across records relating to users, sales leads and CyrusOne employees. The data largely consisted of corporate contact information, including names, physical addresses, phone numbers and job titles. It also included support tickets and other information related to the organisation's operations.
What is known
| People affected | 373,460 (accounts in the leaked data, per Have I Been Pwned) |
|---|---|
| Disclosed | Oct 7, 2026 |
| Happened | Aug 5, 2026 |
| Attack | Insider |
| Data exposed | Emails, Employment, Names, Phone numbers, Addresses |
| Sector | Tech |
| Status | Unverified: not yet confirmed by an official notice, a filing or the organization |
| Check your email | Have I Been Pwned |
Sources
| Source | |
|---|---|
| Have I Been Pwned: CyrusOnehaveibeenpwned.com · Aggregator | Aggregator |
Notices filed
| Where | Filed | People |
|---|---|---|
| Have I Been Pwnedaccounts in the data | Oct 7 | 373,460 |
History of this record
- 2026-10-08 · added · daily source
First seen 2026-10-08 (Have I Been Pwned). Record counts are as reported. Not legal advice.