CyrusOne Data Breach
What Happened
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.
Compromised Data
Recommended Actions
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Try AuraBreach Overview
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Affected Addresses:
373.5k
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Breach Occurred:
August 2026
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Added to HIBP:
7 Oct 2026
Recommended Actions
Change Your Password
If you haven’t already changed the password affected by this breach, do so immediately on every account where it was used.
Enable Two-Factor Authentication
Wherever 2FA is supported, add an extra layer of security to your account.
Trusted by 1.5 million paying customers. Guardio blocks scam calls, texts, emails and websites, and helps you close security gaps in your accounts, so you can go about your day with more peace of mind.
Try Guardio
Use a password manager to generate and store strong, unique passwords for all your accounts. 1Password helps protect your data with industry-leading security.
Try 1Password
Get Aura for identity theft and credit protection. Keep your assets safe with fast fraud alerts, instant credit lock, and $1,000,000 identity theft insurance. Speak to a U.S. based fraud specialist 24/7.
Try Aura