Personal Data Leak Monitor

CyrusOne data breach

373K accounts from CyrusOne (cyrusone.com) were exposed in this breach. Besides email addresses, it included employers, job titles and names.

Breach date
August 5, 2026
Accounts
373,460
Added to the database
October 7, 2026

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What leaked

Email addressesEmployersJob titlesNamesPhone numbersPhysical addressesSupport tickets

What to do now

  1. Do not tap links in emails claiming to be that service
  2. Expect scam emails that use your real name
  3. Be alert to fake delivery or unpaid-bill texts and calls
  4. Be careful with unexpected mail or visitors

Tools that help with this breach

Norton 360PaidVisit the official site →(opens in a new tab)ESETPaidVisit the official site →(opens in a new tab)

About this breach

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.

Source: Have I Been Pwned (CC BY 4.0)

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