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
613
last 12 months, every source
People in US health breaches
70.4M
473 breaches reported to HHS
Material incidents, US listed firms
23
SEC 8-K Item 1.05, 12 months
Accounts in new breach records
521.9M
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 sectorHealthcare748 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. Healthcare748
  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. Finance & Insurance2
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
Healthcare68160241
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

Clear

3,212 incidents match, newest first.

DateOrganisationType of attackSectorWhereAffectedSource
2019-05-28Magellan Health SystemsPhishing / social engineeringHealthcareFL, US65k recordsVCDB
2019-05-24Philadelphia’s Department of Behavioral Health and Intellectual disAbility Services (DBHIDS)Error / misconfigurationHealthcarePA, US1,500 recordsVCDB
2019-05-161to1 HelpError / misconfigurationHealthcareIN300k recordsVCDB
2019-05-01American Baptist Homes of the Midwest,RansomwareHealthcareMN, US—VCDB
2019-05-01Beaumont HealthInsider misuseHealthcareUS-MI, US1 recordsVCDB
2019-05-01Post Acute Medical, LLCInsider misuseHealthcarePA, US—VCDB
2019-05-01Queen Elizabeth HospitalInsider misuseHealthcareGB—VCDB
2019-04-27National Cardiovascular PartnersHacking / intrusionHealthcareCA, US78k recordsVCDB
2019-04-24steps to recoveryError / misconfigurationHealthcareUS-PA, US146k recordsVCDB
2019-04-23Connally Memorial Medical CenterTheft or lossHealthcareTX, US7,358 recordsVCDB
2019-04-18UMass Memorial Community HealthlinkHacking / intrusionHealthcareUS-MA, US2 recordsVCDB
2019-04-17Regional Cancer Care Associates LLC Hacking / intrusionHealthcareNJ, US—VCDB
2019-04-10Main Street Clinical Associates, PATheft or lossHealthcareNC, US—VCDB
2019-04-07Shingle Springs Health and Wellness Center RansomwareHealthcareCA, US—VCDB
2019-04-01Quantum Vision Centers and Eye Surgery Center LLC,RansomwareHealthcareIL, US—VCDB
2019-03-30University of Florida Health ShandsInsider misuseHealthcareFL, US1,562 recordsVCDB
2019-03-13Bloodworks NorthwestTheft or lossHealthcareWA, US1,893 recordsVCDB
2019-02-19Addison County Home Health & HospiceHacking / intrusionHealthcareVT, US—VCDB
2019-02-08Starling Physicians Phishing / social engineeringHealthcareCT, US—VCDB
2019-01-09Columbia Surgical SpecialistsRansomwareHealthcareWA, US400k recordsVCDB
2019-01-01Advocate Christ Medical CenterError / misconfigurationHealthcareUS-IL, US1 recordsVCDB
2019-01-01Belfast health trustError / misconfigurationHealthcareIE—VCDB
2019-01-01Bradford Royal InfirmaryInsider misuseHealthcareGB—VCDB
2019-01-01Excela HealthTheft or lossHealthcarePA, US16k recordsVCDB
2019-01-01Kalispell Regional HealthcarePhishing / social engineeringHealthcareMT, US—VCDB
2019-01-01Katherine Shaw Bethea HospitalHacking / intrusionHealthcareIL, US1,486 recordsVCDB
2019-01-01Letterkenny University HospitalError / misconfigurationHealthcareIE33 recordsVCDB
2019-01-01Michael Garron HospitalRansomwareHealthcareCA-ON, CA—VCDB
2019-01-01MobilexUSAError / misconfigurationHealthcareUS-MD, US1.0M recordsVCDB
2019-01-01NCH Healthcare systemHacking / intrusionHealthcareFL, US—VCDB
2019-01-01Nanaimo Regional General HospitalInsider misuseHealthcareCA102 recordsVCDB
2019-01-01Northern Light Acadia Hospital Error / misconfigurationHealthcareMN, US—VCDB
2019-01-01Riverplace Counseling CenterMalwareHealthcareMN, US12k recordsVCDB
2019-01-01Sarrell DentalRansomwareHealthcareUS-AL, US—VCDB
2019-01-01Unlimited Family Services, LLCInsider misuseHealthcareCT, US—VCDB
2019-01-01Unnamed organisationHacking / intrusionHealthcareUS-TX, US—VCDB
2019-01-01Veritas GeneticsUnknownHealthcareUS-MA, US—VCDB
2018-12-01UConn HealthPhishing / social engineeringHealthcareCT, US326k recordsVCDB
2018-11-16SSM HealthError / misconfigurationHealthcareMO, US301k recordsVCDB
2018-10-07The Little ClinicError / misconfigurationHealthcareTN, US11k recordsVCDB
2018-09-11Maffi ClinicRansomwareHealthcareAZ, US10k recordsVCDB
2018-09-03Aspire HealthHacking / intrusionHealthcareTN, US124 recordsVCDB
2018-08-27New England DermatologyError / misconfigurationHealthcareMA, US16k recordsVCDB
2018-08-15Ryde HospitalError / misconfigurationHealthcareAU1 recordsVCDB
2018-07-27New England DermatologyError / misconfigurationHealthcareMA, US16k recordsVCDB
2018-07-10Ohio LivingHacking / intrusionHealthcareOH, US6,510 recordsVCDB
2018-07-09Cass Regional Medical CenterRansomwareHealthcareMO, US—VCDB
2018-07-06Taf Adoption AgencyError / misconfigurationHealthcareIL—VCDB
2018-07-01Envision Healthcare CorporationHacking / intrusionHealthcareTN, US—VCDB
2018-07-01Guardant HealthHacking / intrusionHealthcareUS—VCDB

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 2026-10-14 07:25 UTC.