Data Breach WatchDBW

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monitoring

Updated 8 days ago

CyrusOne, LLC. Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving CyrusOne, LLC..
•Discovered on August 23, 2026.
•Possible data exposed: Customer Data, Salesforce Records, SharePoint Data.
•Confirmation level: Based on reports.

Detailed summary

In August 2026, the ShinyHunters ransomware group claimed responsibility for a data breach affecting CyrusOne, LLC. The group stated they held 12.9 million Salesforce records and 369.6 GB of compressed SharePoint data. They also claimed to have more than 182,000 rows of customer data.

The incident has not been confirmed by CyrusOne, LLC. or a regulatory body, and the full extent of the compromised data remains unclear. Details about when the breach occurred, when it was discovered, or when consumers were notified have not been publicly disclosed.

Additional information may emerge as the situation develops, and official notifications, if any, may be delayed.

Data possibly involved

Customer Data
Salesforce Records
SharePoint Data

Company Response Timeline

Breach Occurred

Aug 23, 2026

Company Discovered

Unknown

Regulator Notified

Unknown

Consumers Notified

Unknown

Breach Verification Status

Reports Only

Current

Initial dark web reports of potential breach

Company Confirmed

Company has acknowledged the breach

Regulator Confirmed

Confirmed by regulatory authorities

Note: Breach verification can take time. Information may evolve as more details become available from companies and regulators.

Case Status:

Monitoring

We're monitoring this situation for developments.

Were You Affected By This Breach?

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Check Your Risk Level

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Do you use CyrusOne, LLC.?

Yes

What should I do?

Change your passwords

Update passwords for the affected service and any accounts using the same password

Enable two-factor authentication

Add an extra layer of security to your accounts

Monitor your accounts

Watch for suspicious activity on your financial and online accounts

Watch for phishing attempts

Be cautious of emails or messages claiming to be from the affected company

Consider a credit freeze

Prevent unauthorized access to your credit report

Scan your email for other exposures

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