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. Transportation4
  9. Technology4
  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
Transportation4

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
2019-08-01MUSC HospitalInsider misuseHealthcareSC, US—VCDB
2019-08-01MoviePassError / misconfigurationInformationUS-NY, US16.1M recordsVCDB
2019-08-01National Nuclear Energy Generating Company of UkraineInsider misuseUtilitiesUA—VCDB
2019-08-01Network Solutions Hacking / intrusionInformationAL, US—VCDB
2019-08-01Sunshine Behavioral Health, LLCError / misconfigurationHealthcareUS—VCDB
2019-08-01Telecare CorpHacking / intrusionHealthcareCA, US821 recordsVCDB
2019-07-31SEVEN-ELEVEN JAPAN CO.,LTD.Hacking / intrusionRetailJP-13, JP808 recordsVCDB
2019-07-27Club Penguin Rewritten (July 2019) cprewritten.netData breach (cause not stated)——4.0M accountsHIBP
2019-07-27LimeLeadsError / misconfigurationInformationCA, US49.0M recordsVCDB
2019-07-26EquinoxHacking / intrusionHealthcareNY, US100k recordsVCDB
2019-07-26StockX stockx.comData breach (cause not stated)——6.8M accountsHIBP
2019-07-25MGM Resorts mgmresorts.comData breach (cause not stated)——3.1M accountsHIBP
2019-07-25MGM Resorts (2022 Update) mgmresorts.comData breach (cause not stated)——24.8M accountsHIBP
2019-07-24 Aegis Medical GroupInsider misuseHealthcareFL, US—VCDB
2019-07-24Niche.com Inc.Hacking / intrusionInformationUS-PA, US—VCDB
2019-07-22YouHodlerError / misconfigurationFinance & InsuranceCH86.0M recordsVCDB
2019-07-21Cracked.to cracked.toData breach (cause not stated)——749k accountsHIBP
2019-07-21Oranga TamarikiError / misconfigurationPublic AdministrationNZ-AUK, NZ1 recordsVCDB
2019-07-21neoclinical Error / misconfigurationProfessional ServicesAU37k recordsVCDB
2019-07-20Unnamed organisationInsider misuseHealthcareNH, US—VCDB
2019-07-19Texas Health ResourcesError / misconfigurationHealthcareTX, US—VCDB
2019-07-18Clinicare Walk-in ClinicError / misconfigurationHealthcareCA—VCDB
2019-07-18Librería PorrúaHacking / intrusionInformationX-DF, MX2.1M recordsVCDB
2019-07-16Flash Flash Revolution (2019 breach) flashflashrevolution.comData breach (cause not stated)——1.9M accountsHIBP
2019-07-16iNSYNQRansomwareProfessional ServicesUS-WA, US—VCDB
2019-07-15 PrimoHoagies Franchising, Inc.Hacking / intrusionAccommodation & FoodNJ, US—VCDB
2019-07-15Bulgarian National Revenue Agency nap.bgData breach (cause not stated)——471k accountsHIBP
2019-07-15Librería PorrúaError / misconfigurationInformationMX-DF, MX21 recordsVCDB
2019-07-14BlackSpigotMC blackspigot.comData breach (cause not stated)——140k accountsHIBP
2019-07-11Gekko GroupError / misconfigurationAccommodation & FoodFR—VCDB
2019-07-09 Syracuse City School DistrictRansomwareEducationUS-NY, US—VCDB
2019-07-08Premier Family MedicalRansomwareHealthcareUT, US—VCDB
2019-07-08Vedantu vedantu.comData breach (cause not stated)——687k accountsHIBP
2019-07-04Honda Motor ManufacturingError / misconfigurationManufacturingJP134.0M recordsVCDB
2019-07-03PM ConsultantsRansomwareInformationOR, US—VCDB
2019-07-02St John's AmbulanceRansomwareHealthcareGB—VCDB
2019-07-02choice hotelsHacking / intrusionAccommodation & FoodUS700k recordsVCDB
2019-07-01 Brooklyn Hospital CenterRansomwareHealthcareNY, US—VCDB
2019-07-01Bayamon Medical Center y Puerto Rico Women And Children’s Hospital RansomwareHealthcarePR520k recordsVCDB
2019-07-01Bilancione Dental ClinicRansomwareHealthcareFL, US—VCDB
2019-07-01Brooklyn Hospital CenterRansomwareHealthcareNY, US—VCDB
2019-07-01Democratic Senate Campaign Electoral CommitteeError / misconfigurationOther ServicesUS—VCDB
2019-07-01Deutsche BankHacking / intrusionFinance & InsuranceDE—VCDB
2019-07-01Leadership for Educational EquityError / misconfigurationEducationDC, US3.6M recordsVCDB
2019-07-01Mahaveer PharmaInsider misuseManufacturingIN—VCDB
2019-07-01Michigan MedicineHacking / intrusionHealthcareMI, US—VCDB
2019-07-01Planet Calypso planetcalypsoforum.comData breach (cause not stated)——62k accountsHIBP
2019-07-01QuickBitError / misconfigurationFinance & InsuranceSE3.0M recordsVCDB
2019-07-01Quidd quidd.coData breach (cause not stated)——3.8M accountsHIBP
2019-07-01Truman Medical CentersTheft or lossHealthcareMO, US114k 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 2026-10-16 17:41 UTC.