CyrusOne
SourceHave I Been Pwned
StatusConfirmed breach
AddedOctober 7, 2026
OccurredAugust 5, 2026
Accounts affected373,460
Domaincyrusone.com
What was exposed
Email addressesEmployersJob titlesNamesPhone numbersPhysical addressesSupport tickets
What to do if you were affected
- Expect more phishing and spam at this address. Treat messages that reference this company with extra caution.
- Watch for text-message phishing and SIM-swap attempts on your phone number.
- Be wary of targeted scams that use your personal details to sound convincing.
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Protect your data Details
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.
Frequently asked questions
What is the CyrusOne data breach?
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...
When did the data breach happen?
This data breach occurred around August 2026.
How many accounts were affected?
Around 373,460 accounts were affected.
What information was exposed?
Exposed data included Email addresses, Employers, Job titles, Names, Phone numbers, Physical addresses and Support tickets.
What should I do if I was affected?
Expect more phishing and spam at this address. Treat messages that reference this company with extra caution. Watch for text-message phishing and SIM-swap attempts on your phone number. Be wary of targeted scams that use your personal details to sound convincing.
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