// UNCLASSIFIED // CLEARED FOR PUBLIC RELEASE //
FILE BRC-hibpDTG 0600Z
ColdRecon / Breach Radar / CyrusOne
Breach Record

CyrusOne

DISCLOSED 2026-08-05 · STOLEN CREDS · 373,460 RECORDS EXPOSED

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...

The record

What we know

Disclosed
2026-08-05
Attack vector
Stolen Creds
Records exposed
373,460
Domain
cyrusone.com
Data classes exposed
Email addressesEmployersJob titlesNamesPhone numbersPhysical addressesSupport tickets
Sources

Cited reporting

↗ Have I Been Pwned (2026-10-07)
Similar vector · recent

Other stolen creds breaches on file

Ricardo · 2026-10-10 Nihon Keizai Shimbun · 2026-10-09 Nihon Keizai Shimbun · 2026-10-08 Nihon Keizai Shimbun · 2026-10-07 Nihon Keizai Shimbun · 2026-10-06 Central Person Register (CPR) · 2026-10-05 Double Counter · 2026-10-04 Revolut · 2026-09-27

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