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. 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
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
2018-07-01Pacific Radiology’s Dunedin HospitalError / misconfigurationHealthcareNZ26 recordsVCDB
2018-07-01Thompson Health's M.M. Ewing Continuing Care CenterInsider misuseHealthcareNY, US1 recordsVCDB
2018-07-01Tuscon Medical CenterError / misconfigurationHealthcareAZ, US1,800 recordsVCDB
2018-07-01Unidentified Helsinki Contraception Clinic (No Longer in Business)Error / misconfigurationHealthcareFI25 recordsVCDB
2018-06-30Fetal Diagnostic Institute of the PacificRansomwareHealthcareHI, US41k recordsVCDB
2018-06-30Unidentified HospitalTheft or lossHealthcareFR—VCDB
2018-06-18Utah Valley Eye CenterHacking / intrusionHealthcareUT, US20k recordsVCDB
2018-06-15Amicus HealthError / misconfigurationHealthcareGB258 recordsVCDB
2018-06-08InterAct of Michigan, Inc.Hacking / intrusionHealthcareMI, US1,291 recordsVCDB
2018-06-07University of Pittsburgh Medical CenterHacking / intrusionHealthcarePA, US790 recordsVCDB
2018-06-01Brooke Army Medical CenterInsider misuseHealthcareTX, US50 recordsVCDB
2018-06-01Grant Medical CenterError / misconfigurationHealthcareOH, US3 recordsVCDB
2018-06-01Washington Health SystemInsider misuseHealthcarePA, US1 recordsVCDB
2018-05-26Associated Dermatology and Skin Cancer ClinicTheft or lossHealthcareMT, US1,254 recordsVCDB
2018-05-14Billings ClinicHacking / intrusionHealthcareMT, US8,400 recordsVCDB
2018-05-12Blue Spring's Family CareRansomwareHealthcareMO, US45k recordsVCDB
2018-05-10Elmcroft Senior LivingHacking / intrusionHealthcareUS-KY, US—VCDB
2018-04-17Southwestern Eye CenterError / misconfigurationHealthcareAZ, US667 recordsVCDB
2018-04-09eHealth SaskatchewanInsider misuseHealthcareSK, CA10 recordsVCDB
2018-04-03NorthStar AnesthesiaHacking / intrusionHealthcareTX, US—VCDB
2018-04-01Alasks Division of Public AssistanceMalwareHealthcareAK, US500 recordsVCDB
2018-03-30Confluence HealthHacking / intrusionHealthcareWA, US—VCDB
2018-03-30John A Moran Eye CenterTheft or lossHealthcareUT, Unknown607 recordsVCDB
2018-03-15University Medical Center Health System, UMC PhysiciansPhishing / social engineeringHealthcareTX, US18k recordsVCDB
2018-03-14Los Angeles County 211 ServicesError / misconfigurationHealthcareCA, US—VCDB
2018-03-04SK Institute of Medical SciencesTheft or lossHealthcareIN—VCDB
2018-03-01Sunspire HealthHacking / intrusionHealthcareNJ, US—VCDB
2018-03-01UnityPoint HealthPhishing / social engineeringHealthcareIA, US1.4M recordsVCDB
2018-02-28Scenic Bluffs Community Health CenterHacking / intrusionHealthcareWI, US2,889 recordsVCDB
2018-02-06Chesapeake Regional Health Care Sleep Center Theft or lossHealthcareVA, US2,000 recordsVCDB
2018-01-23Christ the King ManorPhishing / social engineeringHealthcarePA, US—VCDB
2018-01-16Allied Medical AssociatesError / misconfigurationHealthcareCT, US72 recordsVCDB
2018-01-12Front Range Dermatology AssociatesInsider misuseHealthcareCO, US—VCDB
2018-01-10Hancock HealthRansomwareHealthcareIN, US—VCDB
2018-01-10Steuben County Adult Protective Home Care UnitTheft or lossHealthcareNY, Unknown—VCDB
2018-01-01Associates in Medicine PA Insider misuseHealthcareTX, US—VCDB
2018-01-01Ballad HealthInsider misuseHealthcareTN, US—VCDB
2018-01-01CCRM Dallas-Fort WorthHacking / intrusionHealthcareTX, US1,117 recordsVCDB
2018-01-01Central Health NewfoundlandInsider misuseHealthcareCA240 recordsVCDB
2018-01-01Eastern HealthError / misconfigurationHealthcareCA30 recordsVCDB
2018-01-01Holt Medical PracticeInsider misuseHealthcareGB150 recordsVCDB
2018-01-01Hova HealthError / misconfigurationHealthcareMX2.4M recordsVCDB
2018-01-01Kaiser of ColoradoError / misconfigurationHealthcareCO, US1,290 recordsVCDB
2018-01-01MSK GroupHacking / intrusionHealthcareTN, US—VCDB
2018-01-01McGuire Memorial HomeInsider misuseHealthcarePA, US6 recordsVCDB
2018-01-01Newfoundland and Labrador Medical Care PlanError / misconfigurationHealthcareCA-NL, CA3,300 recordsVCDB
2018-01-01St Peter's Surgery and Endoscopy CenterRansomwareHealthcareNY, US135k recordsVCDB
2018-01-01St. Vincent's HospitalError / misconfigurationHealthcareAU200 recordsVCDB
2018-01-01Steward Healthcare SystemInsider misuseHealthcareMA, US—VCDB
2018-01-01USACS Management GroupHacking / intrusionHealthcareUS16k 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 2026-10-14 08:17 UTC.