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CyrusOne – 373,460 breached accounts

Redpacketsecurity •admin • October 9, 2026

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 information, including names, physical addresses, phone numbers and job titles. It also included support tickets and other information related to the organisation’s operations.

Published Date: Wed, 07 Oct 2026 23:19:16 Z

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The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

CyrusOne and Neogen Suffer Major Data Breaches In August 2026, both CyrusOne and Neogen were targeted by the ShinyHunters group in separate 'pay or leak' extortion attempts. CyrusOne reported a breach affecting 373,460 accounts, with data including email addresses, names, and corporate records. Similarly, Neogen experienced a breach impacting 435,963 accounts, with data primarily consisting of corporate records and email addresses. The breaches have raised concerns about the security of sensitive corporate information. Both companies have not confirmed the extent of the breaches or the current status of their investigations. The incidents highlight the ongoing threat posed by ransomware groups using extortion tactics to compromise organizations. 2 sources 52

CyrusOne – 373,460 breached accounts

The full story

Extracted Entities

Attack Types (1)

Companies (1)