Company archive

CyrusOne data breach history

Breached tracks public reports, source links, affected counts, exposed data types, and updates for CyrusOne.

Breaches

1

Known affected

373,460

Latest report

10/8/2026

Data types

7

Common exposed data

Email addresses Employers Job titles Names Phone numbers Addresses Support tickets

Tracked reports

Shareable Link

Medium2h ago

CyrusOne

Data centre operator CyrusOne had data on approximately 373,000 accounts published by the ShinyHunters group following an extortion attempt in August 2026.

Email addressesEmployersJob titles+4 more

373K