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. Accommodation & Food3
  11. Administrative3
  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
2020-06-24EyeMed Vision CareHacking / intrusionHealthcareOH, US1.5M recordsVCDB
2020-06-16A place for momInsider misuseHealthcareTX, US—VCDB
2020-06-15Arizona Asthma and Allergy InstituteRansomwareHealthcareAZ, US—VCDB
2020-06-06Lorien Health ServicesRansomwareHealthcareMD, US48k recordsVCDB
2020-06-01Crozer-KeystoneRansomwareHealthcarePA, US—VCDB
2020-06-01Hockley General Practice SurgeryHacking / intrusionHealthcareGB—VCDB
2020-06-01Lorien Health ServicesRansomwareHealthcareMD, US50k recordsVCDB
2020-06-01Muskingum Valley Health Centers RansomwareHealthcareOH, US7,447 recordsVCDB
2020-06-01North Okanagan Pediatric ClinicRansomwareHealthcareBC, CA—VCDB
2020-05-20Allergy and Asthma Clinic of Fort WorthHacking / intrusionHealthcareTX, US70k recordsVCDB
2020-05-18Woodlawn Dental CenterRansomwareHealthcareOH, US14k recordsVCDB
2020-05-01All Points LodgeInsider misuseHealthcareCO, US—VCDB
2020-05-01Awanui Rest HomeInsider misuseHealthcareNZ—VCDB
2020-05-01Dr. Kristin Tarbert Plastic Surgery OfficesHacking / intrusionHealthcareWA, US22k recordsVCDB
2020-05-01FreseniusRansomwareHealthcareNO—VCDB
2020-05-01NHS OrkneyError / misconfigurationHealthcareGB51 recordsVCDB
2020-05-01South East Coast AmbulanceError / misconfigurationHealthcareGB—VCDB
2020-04-30Salinas Valley Memorial Healthcare SystemHacking / intrusionHealthcareCA, US—VCDB
2020-04-21Parkview Medical CenterRansomwareHealthcareCO, US—VCDB
2020-04-17Pinnacle Clinical ResearchHacking / intrusionHealthcareTX, US—VCDB
2020-04-11Magellan HealthRansomwareHealthcareUS—VCDB
2020-04-06Children's Hospital of ColoradoHacking / intrusionHealthcareCO, US2,554 recordsVCDB
2020-04-01Alberta Health ServicesError / misconfigurationHealthcareCA—VCDB
2020-04-01Carillon at Belleview StationTheft or lossHealthcareCO, US1 recordsVCDB
2020-04-01Huiying MedicalHacking / intrusionHealthcareCN—VCDB
2020-03-01Mental Health Center of Boulder County Inc. dba Mental Health PartnersHacking / intrusionHealthcareCO, US—VCDB
2020-03-01University Hospital BrnoRansomwareHealthcareCZ—VCDB
2020-02-20Center for Health Education, Medicine & Dentistry ("CHEMED") Hacking / intrusionHealthcareNJ, US—VCDB
2020-02-13FHN (Family Healthcare Network)Hacking / intrusionHealthcareIL, US—VCDB
2020-02-10NextMotionError / misconfigurationHealthcareFR900k recordsVCDB
2020-02-04Breach Candy HospitalError / misconfigurationHealthcareIN—VCDB
2020-01-31Colorado Mental Health Institute at PuebloError / misconfigurationHealthcareCO, US—VCDB
2020-01-27Hawaii Pacific HealthInsider misuseHealthcareHI, US—VCDB
2020-01-27St. Peter's Health Partners Medical AssociatesError / misconfigurationHealthcareNY, US1,789 recordsVCDB
2020-01-22Ambry GeneticsHacking / intrusionHealthcareCA, US230k recordsVCDB
2020-01-15VA Sierra Nevada Health Care SystemError / misconfigurationHealthcareNV, US—VCDB
2020-01-10RANDLEMAN EYE CENTERRansomwareHealthcareNC, US—VCDB
2020-01-06Riverview HealthError / misconfigurationHealthcareIN, US2,600 recordsVCDB
2020-01-03Beaumont HospitalHacking / intrusionHealthcareMI, US6,000 recordsVCDB
2020-01-01Andrews BracesRansomwareHealthcareNV, US17k recordsVCDB
2020-01-01Brandywine Counseling and Community ServicesRansomwareHealthcareDE, US—VCDB
2020-01-01Dr.Martin JugenburgInsider misuseHealthcareCA—VCDB
2020-01-01Erlanger Health SystemError / misconfigurationHealthcareTN, US4,938 recordsVCDB
2020-01-01Lake County Behavioral Health Services ClinicTheft or lossHealthcareUS—VCDB
2020-01-01Nashville Plastic Surgery Institute, LLCRansomwareHealthcareTN, US—VCDB
2020-01-01Northwestern MemorialInsider misuseHealthcareIL, US—VCDB
2020-01-01Quantum Imaging and Therapeutic AssociatesInsider misuseHealthcarePA, US1 recordsVCDB
2019-12-01Center for Health Care ServicesRansomwareHealthcareTX, US—VCDB
2019-12-01Center for Health Care ServicesRansomwareHealthcareTX, US—VCDB
2019-12-01Hackensack Meridian HealthRansomwareHealthcareNJ, US—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 06:05 UTC.