Data Breaches

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  2. Cognitive Health Technologies LLC

    NY, US · Business Associate · Hacking/IT Incident
    49.5Kpeople
    Disclosed
    HHS OCR breach portal Official register
    • Network Server

  3. CyrusOne

    cyrusone.com
    373.5Kaccounts
    Breached Disclosed
    Have I Been Pwned Verified
    • Email addresses
    • Employers
    • Job titles
    • Names
    • Phone numbers
    • Physical addresses
    • Support tickets
    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.

  4. The Speech Clinic, LLC

    GA, US · Healthcare Provider · Hacking/IT Incident
    2.2Kpeople
    Disclosed
    HHS OCR breach portal Official register
    • Network Server

  6. Double Counter

    doublecounter.gg
    274.9Kaccounts
    Breached Disclosed
    Have I Been Pwned Verified
    • Email addresses
    • Geographic locations
    • Names
    • Usernames
    In October 2026, the Discord server protection service Double Counter suffered a data breach attributed to a vulnerability in the Metabase analytics tool. In its disclosure notice, Double Counter advised that attackers gained access to a subset of its data. A corpus of data was subsequently published publicly and contained 275k unique email addresses and Discord usernames. A small number of records belonging to paying subscribers whose purchases were processed via Stripe were also present and included names, countries and postcodes.

  7. Angel One

    angelone.in
    6.8Maccounts
    Breached Disclosed
    Have I Been Pwned Verified
    • Bank account numbers
    • Dates of birth
    • Email addresses
    • Financial investments
    • Government issued IDs
    • Names
    • Phone numbers
    • +1 more
    In July 2024, the Indian stock brokerage firm Angel One confirmed that data leaked online related to a breach that occurred in April 2023. The leaked data included 7.9M user records containing 6.8M unique email addresses, along with names, physical addresses, phone numbers, bank account numbers, Permanent Account Numbers (PANs) and portfolio holdings. Angel One emphasised that the breach "has no impact on client securities, funds, or credentials".

  9. Nabi Health, Inc.

    CA, US · Business Associate · Unauthorized Access/Disclosure
    783people
    Disclosed
    HHS OCR breach portal Official register
    • Network Server
    • Other

  10. iRhythm Technologies Inc.

    WA, US
    220.7Kpeople
    Breached Disclosed
    Washington State AG Official register
    • Name
    • Full Date of Birth
    • Health Insurance Policy or ID Number
    • Medical Information
    • Protected Health Information owned or licensed by a HIPAA covered entity

  12. Harman Fitness

    CA, US
    —not stated
    Breached Disclosed
    California AG Official register

  13. Gary Gotthelf, MD and Associates

    FL, US · Healthcare Provider · Hacking/IT Incident
    685people
    Disclosed
    HHS OCR breach portal Official register
    • Network Server

  14. Hattiesburg Eye Clinic, P.A.

    MS, US · Healthcare Provider · Hacking/IT Incident
    6.1Kpeople
    Disclosed
    HHS OCR breach portal Official register
    • Network Server

  16. Advantest America, Inc.

    CA, US
    —not stated
    Breached Disclosed
    California AG Official register

  17. iRhythm Technologies, Inc.

    CA, US · Healthcare Provider · Hacking/IT Incident
    8.2Mpeople
    Disclosed
    HHS OCR breach portal Official register
    • Network Server

  18. Innovative Alternatives, Inc

    TX, US · Healthcare Provider · Hacking/IT Incident
    1.5Kpeople
    Disclosed
    HHS OCR breach portal Official register
    • Desktop Computer
    • Network Server

  21. Bright Smile Dental Care

    IN, US · Healthcare Provider · Hacking/IT Incident
    7.6Kpeople
    Disclosed
    HHS OCR breach portal Official register
    • Network Server

  22. Arkansas Urology, P.A.

    AR, US · Healthcare Provider · Hacking/IT Incident
    4.3Kpeople
    Disclosed
    HHS OCR breach portal Official register
    • Email

  23. Denver Health Medical Plan

    CO, US · Health Plan · Hacking/IT Incident
    238.1Kpeople
    Disclosed
    HHS OCR breach portal Official register
    • Network Server

  24. Bay Area Psychological Consultants

    FL, US · Healthcare Provider · Hacking/IT Incident
    5.7Kpeople
    Disclosed
    HHS OCR breach portal Official register
    • Electronic Medical Record
    • Network Server

Breach records: Have I Been Pwned (CC BY 4.0), the HHS OCR breach portal, the Washington State Attorney General and the California Attorney General breach registers (public records). Last synced 21 hours ago.