Breaches & incidents

The victims' side of the threat pictureWho is being attacked

Data breaches and cyber incidents made public — reported to regulators, disclosed by the companies themselves, or catalogued after a leak. Who was hit, when, how, and how many people or accounts were affected.

Incidents disclosed
616
last 12 months, every source
People in US health breaches
70.4M
475 breaches reported to HHS
Material incidents, US listed firms
23
SEC 8-K Item 1.05, 12 months
Accounts in new breach records
522.5M
126 breaches added to HIBP

Coverage. Mostly the United States: the cleanest public records of named victims come from US regulators. Ransomware victims worldwide, India included, are on the ransomware victims page. Every count is a lower bound — only disclosed incidents appear.

1Key findings

  • Most common attackHacking / intrusion78% of named-victim incidents in the last 24 months
  • Most targeted sectorHealthcare752 incidents in the last 24 months
  • Most people affectedConduent Business Services LLC62.2M people · 8 Oct 2025
  • Most accounts exposed1win96.2M accounts · 2 Nov 2024
  • Named most oftenFieldtex Products, Inc.in 5 disclosures, 20 Nov 2025 – 12 Dec 2025
  • Latest disclosurePark Dental Partners, Inc.Hacking / intrusion · 7 Oct 2026 · SEC 8-K

3Sectors

Who the incidents hit, where the source names a sector, and how each sector was attacked.

Most affected sectorsLast 24 months. Select one to list its incidents.
  1. Healthcare752
  2. Information28
  3. Manufacturing21
  4. Professional Services19
  5. Retail18
  6. Finance, Insurance & Real Estate6
  7. Services5
  8. Technology4
  9. Transportation4
  10. Accommodation & Food3
  11. Administrative3
  12. Other Services2
Sector against type of attackIncidents per sector (rows) and attack type (columns). Darker means more.
  • In healthcare, 91% of incidents were hacking / intrusion.
Hacking / intrusionData breach (cause not stated)Unauthorised access or disclosureRansomwareTheft or lossError / misconfiguration
Healthcare68461241
Information253
Manufacturing201
Professional Services181
Retail171
Finance, Insurance & Real Estate6
Services5
Technology4

4Largest incidents

The last 24 months. People and accounts are counted apart: an account list can hold one person many times. Credential compilations, which name no victim, are left out.

By people affected
  1. 1
    Conduent Business Services LLC62.2M people
    8 Oct 2025 · Hacking / intrusion · Healthcare · HHS
  2. 2
    DentaQuest, LLC15.0M people
    16 Jul 2026 · Hacking / intrusion · Healthcare · HHS
  3. 3
    Aflac Incorporated (“Aflac”)13.9M people
    8 Aug 2025 · Hacking / intrusion · Healthcare · HHS
  4. 4
    Aesto, LLC9.5M people
    31 Jul 2026 · Hacking / intrusion · Healthcare · HHS
  5. 5
    Episource, LLC6.7M people
    6 Jun 2025 · Hacking / intrusion · Healthcare · HHS
  6. 6
    AdaptHealth, LLC4.1M people
    14 Aug 2026 · Hacking / intrusion · Healthcare · HHS
  7. 7
    Unlimited Technology Systems, LLC3.8M people
    21 Jul 2026 · Hacking / intrusion · Healthcare · HHS
  8. 8
    CareCloud, Inc.3.8M people
    24 Jul 2026 · Hacking / intrusion · Healthcare · HHS
By accounts exposed
  1. 1
    1win96.2M accounts
    2 Nov 2024 · Data breach (cause not stated) · HIBP
  2. 2
    Under Armour72.7M accounts
    17 Nov 2025 · Data breach (cause not stated) · HIBP
  3. 3
    Suno55.3M accounts
    25 Nov 2025 · Data breach (cause not stated) · HIBP
  4. 4
    Canadian Tire38.3M accounts
    2 Oct 2025 · Data breach (cause not stated) · HIBP
  5. 5
    Addi34.5M accounts
    25 Mar 2026 · Data breach (cause not stated) · HIBP
  6. 6
    SoundCloud29.8M accounts
    15 Dec 2025 · Data breach (cause not stated) · HIBP
  7. 7
    Speedio27.5M accounts
    24 Dec 2024 · Data breach (cause not stated) · HIBP
  8. 8
    Paidwork23.3M accounts
    29 Mar 2026 · Data breach (cause not stated) · HIBP

5Hit more than once

Organisations named in more than one disclosure in the last 5 years (30 in all). That can be separate attacks, or one incident reported to more than one place — a regulator and investors, or on behalf of several clients.

OrganisationDisclosuresFirst – latestTypes of attackSources
Fieldtex Products, Inc. · Healthcare520 Nov 2025 – 12 Dec 2025Hacking / intrusionHHS
AltaMed Health Services Corporation · Healthcare31 Jun 2023 – 26 Feb 2026Hacking / intrusionRansomwareUnauthorised access or disclosureHHS, VCDB
United Healthcare Student Resources · Finance & Insurance31 Jun 2023 – 1 Jun 2023RansomwareVCDB
DentaQuest, LLC · Healthcare223 May 2026 – 16 Jul 2026Data breach (cause not stated)Hacking / intrusionHHS, HIBP
CarMax · Retail22 May 2025 – 24 Jan 2026Data breach (cause not stated)Hacking / intrusionHIBP, VCDB
Park Dental Partners, Inc. · Healthcare228 Aug 2026 – 7 Oct 2026Hacking / intrusionSEC 8-K
WindRose Health Network · Healthcare227 Jan 2026 – 16 Sept 2026Hacking / intrusionHHS
AdaptHealth, LLC · Healthcare227 Jun 2026 – 14 Aug 2026Hacking / intrusionHHS, SEC 8-K
CareCloud, Inc. · Healthcare224 Mar 2026 – 24 Jul 2026Hacking / intrusionHHS, SEC 8-K
Clinical Registry Solutions · Healthcare29 Apr 2026 – 12 Jun 2026Hacking / intrusionHHS, VCDB
Open Arms Care Corporation · Healthcare21 Jun 2025 – 11 Jun 2026Hacking / intrusionHHS, VCDB
Gastro Health · Healthcare222 May 2026 – 22 May 2026Hacking / intrusionHHS

6All incidents

Clear

3,216 incidents match, newest first.

DateOrganisationType of attackSectorWhereAffectedSource
2014-01-01Olmstead Medical CenterHacking / intrusionHealthcareMN, US—VCDB
2014-01-01Orthomed Appliance Inc.Insider misuseHealthcareCA, US—VCDB
2014-01-01Partners in CareInsider misuseHealthcareNY, US1 recordsVCDB
2014-01-01Penn Highlands BrookvilleUnknownHealthcarePA, US—VCDB
2014-01-01Penn Medicine RittenhouseTheft or lossHealthcarePA, US661 recordsVCDB
2014-01-01PhysioMedicorMalwareHealthcareDE—VCDB
2014-01-01Presence Saint Joseph Medical CenterError / misconfigurationHealthcareIL, US874 recordsVCDB
2014-01-01Providence HospitalInsider misuseHealthcareAK, US2 recordsVCDB
2014-01-01Rady Children's HospitalError / misconfigurationHealthcareCA, US6,307 recordsVCDB
2014-01-01Rady Childrens HospitalError / misconfigurationHealthcareCA, US14k recordsVCDB
2014-01-01Regal ChambersInsider misuseHealthcareGB1 recordsVCDB
2014-01-01Riverside County Regional Medical CenterTheft or lossHealthcareCA, US563 recordsVCDB
2014-01-01Royal Blackburn HospitalInsider misuseHealthcareGB1 recordsVCDB
2014-01-01Royal Prince Alfred HospitalError / misconfigurationHealthcareAU1 recordsVCDB
2014-01-01ST. VINCENT ANDERSON REGIONAL HOSPITAL, INC.Error / misconfigurationHealthcareIN, US63k recordsVCDB
2014-01-01Salina Family Healthcare CenterError / misconfigurationHealthcareUS—VCDB
2014-01-01Self Regional HealthcareTheft or lossHealthcareSC, US500 recordsVCDB
2014-01-01Short Hills AssociatesInsider misuseHealthcareNJ, US1 recordsVCDB
2014-01-01South Jersey Hospital Inc.Theft or lossHealthcareNJ, US—VCDB
2014-01-01South Shore Physicians GroupInsider misuseHealthcareNY, US80 recordsVCDB
2014-01-01Southwest Virginia Physicians for WomenTheft or lossHealthcareVA, US568 recordsVCDB
2014-01-01Swedish Medical CenterInsider misuseHealthcareWA, US—VCDB
2014-01-01Synergy HomeCareInsider misuseHealthcareCT, US2 recordsVCDB
2014-01-01Tacoma-Pierce County Health DepartmentInsider misuseHealthcareWA, US—VCDB
2014-01-01Tampa General HospitalInsider misuseHealthcareFL, US675 recordsVCDB
2014-01-01Texas Health Care, P.L.L.C.Theft or lossHealthcareTX, US554 recordsVCDB
2014-01-01Tri-City Medical CenterTheft or lossHealthcareCA, US35k recordsVCDB
2014-01-01Ulysses Acquisitions IncInsider misuseHealthcareFL, US—VCDB
2014-01-01UniHealth SOURCETheft or lossHealthcareGA, US4,500 recordsVCDB
2014-01-01University Hospital of LausanneError / misconfigurationHealthcareCH1 recordsVCDB
2014-01-01University Malaya Medical CentreError / misconfigurationHealthcareMY46k recordsVCDB
2014-01-01University of Cincinnati Medical CenterInsider misuseHealthcareOH, US—VCDB
2014-01-01University of Pittsburgh Medical CenterUnknownHealthcarePA, US27k recordsVCDB
2014-01-01UnknownInsider misuseHealthcareDC, US78 recordsVCDB
2014-01-01UnknownInsider misuseHealthcareUS—VCDB
2014-01-01UnknownInsider misuseHealthcareDC, US78 recordsVCDB
2014-01-01UnknownInsider misuseHealthcareUS78 recordsVCDB
2014-01-01Unnamed organisationError / misconfigurationHealthcareAU500 recordsVCDB
2014-01-01Unnamed organisationError / misconfigurationHealthcareCA—VCDB
2014-01-01Unnamed organisationInsider misuseHealthcareMO, US1 recordsVCDB
2014-01-01Unnamed organisationInsider misuseHealthcareMO, US—VCDB
2014-01-01Unnamed organisationError / misconfigurationHealthcareTX, US—VCDB
2014-01-01Valley View Hospital AssociationMalwareHealthcareCO, US5,400 recordsVCDB
2014-01-01Weill Cornell Medical CollegeTheft or lossHealthcareNY, US3,936 recordsVCDB
2014-01-01West Herts Hospitals NHS TrustInsider misuseHealthcareGB—VCDB
2014-01-01Western Regional Center for Brain & Spine SurgeryInsider misuseHealthcareNV, US12k recordsVCDB
2014-01-01Wrexham Maelor HospitalTheft or lossHealthcareGB—VCDB
2014-01-01York Academy of SurgeryError / misconfigurationHealthcarePA, US47 recordsVCDB
2014-01-01York Academy of SurgeryError / misconfigurationHealthcarePA, US—VCDB
2014-01-01arkview Health SystemError / misconfigurationHealthcareIN, US8,000 recordsVCDB

Sources: US HHS breach portal, SEC EDGAR, Have I Been Pwned (CC BY 4.0) and the VERIS Community Database (CC BY-SA 4.0). Updated 2026-10-15 03:59 UTC.