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
614
last 12 months, every source
People in US health breaches
70.5M
478 breaches reported to HHS
Material incidents, US listed firms
21
SEC 8-K Item 1.05, 12 months
Accounts in new breach records
522.5M
125 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 sectorHealthcare756 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. Healthcare756
  2. Information28
  3. Manufacturing21
  4. Professional Services19
  5. Retail18
  6. Finance, Insurance & Real Estate6
  7. Services5
  8. Technology4
  9. Transportation4
  10. Administrative3
  11. Accommodation & Food3
  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
Healthcare68762241
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

11,849 incidents, newest first.

DateOrganisationType of attackSectorWhereAffectedSource
2019-07-01Unnamed organisationInsider misuse—Unknown—VCDB
2019-07-01Unnamed organisationMalwarePublic AdministrationID—VCDB
2019-07-01XKCD xkcd.comData breach (cause not stated)——562k accountsHIBP
2019-06-28Geisinger Health PlanHacking / intrusionFinance & InsurancePA, US—VCDB
2019-06-28TransUnionHacking / intrusionAdministrativeCA-ON, CA37k recordsVCDB
2019-06-28Wickenburg Community HospitalRansomwareHealthcareAZ, US—VCDB
2019-06-28Wickenburg County Hospital RansomwareHealthcareUS—VCDB
2019-06-25 Mid-Valley Behavioral Care NetworkHacking / intrusionFinance & InsuranceOR, US13k recordsVCDB
2019-06-25K12 IncError / misconfigurationEducationVA, US7.0M recordsVCDB
2019-06-23K12.comError / misconfigurationInformationVA, US7.0M recordsVCDB
2019-06-21Southeastern Pennsylvania Transportation AuthorityMalwareTransportationPA, US761 recordsVCDB
2019-06-20Iranian GovernmentUnknownPublic AdministrationIR—VCDB
2019-06-19Artvalue.com artvalue.comData breach (cause not stated)——158k accountsHIBP
2019-06-19Rhode Island Ear, Nose and Throat PhysiciansHacking / intrusionHealthcareRI, US2,943 recordsVCDB
2019-06-18Sweetser Mental HealthPhishing / social engineeringHealthcareIE22k recordsVCDB
2019-06-18Virginia Gay HospitalHacking / intrusionHealthcareUS-IA, US5,031 recordsVCDB
2019-06-18WMNF 88.5-FMRansomwareInformationFL, US—VCDB
2019-06-17Spotsylvania school systemPhishing / social engineeringEducationVA, US—VCDB
2019-06-15Loudoun Medical Group d/b/a Comprehensive Sleep Care Center (CSCC) Hacking / intrusionHealthcareUS-VA, US1 recordsVCDB
2019-06-15VerizonHacking / intrusionInformationUS2.0M recordsVCDB
2019-06-14AvastHacking / intrusionInformationCZ-ST, CZ1 recordsVCDB
2019-06-14Grays Harbor Community Hospital and Harbor Medical GroupRansomwareHealthcareWA, US85k recordsVCDB
2019-06-13Social Engineered socialengineered.netData breach (cause not stated)——89k accountsHIBP
2019-06-13Void.to void.toData breach (cause not stated)——95k accountsHIBP
2019-06-10Wiener BüchereienCredential compilation (no single victim)——224k accountsHIBP
2019-06-04GateHub gatehub.netData breach (cause not stated)——1.4M accountsHIBP
2019-06-02X Social MediaError / misconfigurationProfessional ServicesUS—VCDB
2019-06-01Bulgarian National Revenue AgencyHacking / intrusionProfessional ServicesBG5.0M recordsVCDB
2019-06-01Condo.com condo.comData breach (cause not stated)——1.5M accountsHIBP
2019-06-01GeisingerInsider misuseHealthcarePA, US700 recordsVCDB
2019-06-01Healthcare Administrative PartnersHacking / intrusionAdministrativeUS-PA, US18k recordsVCDB
2019-06-01Marin Community ClinicsRansomwareHealthcareCA, US—VCDB
2019-06-01Singapore Accountancy CommissionError / misconfigurationPublic AdministrationSG6,541 recordsVCDB
2019-06-01University of Nebraska-LincolnTheft or lossEducationNE, US900 recordsVCDB
2019-06-01University of Western AustraliaTheft or lossEducationAU100k recordsVCDB
2019-06-01Unnamed organisationMalwarePublic AdministrationKZ—VCDB
2019-06-01White SoxError / misconfigurationEntertainmentIL, US200 recordsVCDB
2019-05-28Magellan Health SystemsPhishing / social engineeringHealthcareFL, US65k recordsVCDB
2019-05-24CanvaHacking / intrusionInformationAU139.0M recordsVCDB
2019-05-24Canva canva.comData breach (cause not stated)——137.3M accountsHIBP
2019-05-24CanvaUnknownInformationAU-NSW, AU139.0M recordsVCDB
2019-05-24Philadelphia’s Department of Behavioral Health and Intellectual disAbility Services (DBHIDS)Error / misconfigurationHealthcarePA, US1,500 recordsVCDB
2019-05-22Select HealthHacking / intrusionFinance & InsuranceIN, US3,582 recordsVCDB
2019-05-22Select Health NetworkHacking / intrusionFinance & InsuranceIN, US3,582 recordsVCDB
2019-05-20Chan Brothers TravelError / misconfigurationAdministrativeSG450 recordsVCDB
2019-05-17Minehut minehut.comData breach (cause not stated)——397k accountsHIBP
2019-05-161to1 HelpError / misconfigurationHealthcareIN300k recordsVCDB
2019-05-14theta360Error / misconfigurationInformationJP11.0M recordsVCDB
2019-05-10medicaresupplement.comError / misconfigurationFinance & InsuranceUS5.0M recordsVCDB
2019-05-07Ordine Avvocati di Roma ordineavvocatiroma.itData breach (cause not stated)——42k accountsHIBP

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 2026-10-16 18:25 UTC.