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
616
last 12 months, every source
People in US health breaches
70.4M
475 breaches reported to HHS
Material incidents, US listed firms
23
SEC 8-K Item 1.05, 12 months
Accounts in new breach records
522.5M
126 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 sectorHealthcare752 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. Healthcare752
  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
Healthcare68461241
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

3,216 incidents match, newest first.

DateOrganisationType of attackSectorWhereAffectedSource
2013-01-22Basildon and Thurrock University HospitalsError / misconfigurationHealthcareGB—VCDB
2013-01-22Center for Pain Management, LLCTheft or lossHealthcareMD, US5,822 recordsVCDB
2013-01-22Granger Medical ClinicError / misconfigurationHealthcareUT, US2,600 recordsVCDB
2013-01-17Child & Family Psychological Services, Inc.Hacking / intrusionHealthcareMA, US7,250 recordsVCDB
2013-01-17Harbor Medical Associates, PCHacking / intrusionHealthcareMA, US4,343 recordsVCDB
2013-01-17South Shore Medical CenterHacking / intrusionHealthcareMA, US4,100 recordsVCDB
2013-01-17St. Mark's Medical CenterHacking / intrusionHealthcareTX, US2,988 recordsVCDB
2013-01-17University of Michigan Health SystemTheft or lossHealthcareMI, US3,999 recordsVCDB
2013-01-17Washington County EMSTheft or lossHealthcareTX, US1,435 recordsVCDB
2013-01-17Westerville Dental CenterTheft or lossHealthcareOH, US850 recordsVCDB
2013-01-14Erlanger Health SystemError / misconfigurationHealthcareTN, US87 recordsVCDB
2013-01-14Mercy Health SystemsError / misconfigurationHealthcareMD, US25 recordsVCDB
2013-01-09Lucile Packard Children's Hospital at StanfordTheft or lossHealthcareCA, US57k recordsVCDB
2013-01-08United Home Care ServicesTheft or lossHealthcareFL, US14k recordsVCDB
2013-01-04Heyman HospiceCareTheft or lossHealthcareGA, US2,000 recordsVCDB
2013-01-02Women's Health EnterpriseTheft or lossHealthcareGA, US3,000 recordsVCDB
2013-01-01Aesthetic Laser CenterError / misconfigurationHealthcareCalifornia, US1 recordsVCDB
2013-01-01Alberta Children's HospitalInsider misuseHealthcareCA—VCDB
2013-01-01Alpha Ambulance Inc.Insider misuseHealthcareCA, US—VCDB
2013-01-01B N Roy & Associates PCError / misconfigurationHealthcarePA, US—VCDB
2013-01-01BENTON'S ADULT FOSTER CAREInsider misuseHealthcareMI, US—VCDB
2013-01-01BOLTON NHS Foundation TrustError / misconfigurationHealthcareGB25 recordsVCDB
2013-01-01Behavioral Health Network, Inc.Error / misconfigurationHealthcareMA, US190 recordsVCDB
2013-01-01Beypazari State HospitalHacking / intrusionHealthcareTR132 recordsVCDB
2013-01-01Biogenesis of AmericaTheft or lossHealthcareFL, US1 recordsVCDB
2013-01-01Bluewater HealthInsider misuseHealthcareCA17 recordsVCDB
2013-01-01Boca Raton Regional Hospital, Inc.Phishing / social engineeringHealthcareFL, US—VCDB
2013-01-01Boger DentalTheft or lossHealthcareMN, US—VCDB
2013-01-01Bridgemark HealthcareError / misconfigurationHealthcareIL, US—VCDB
2013-01-01Capital HealthError / misconfigurationHealthcareCA—VCDB
2013-01-01CaroMont Regional Medical CenterInsider misuseHealthcareNC, US2 recordsVCDB
2013-01-01CaroMont Regional Medical CenterInsider misuseHealthcareNC, US2 recordsVCDB
2013-01-01Catholic Health Care ServicesTheft or lossHealthcarePA, US412 recordsVCDB
2013-01-01Catoctin DentalHacking / intrusionHealthcareMD, US—VCDB
2013-01-01Child, Youth and FamilyError / misconfigurationHealthcareNZ1 recordsVCDB
2013-01-01Clinical Reference Laboratory, IncError / misconfigurationHealthcareKS, US—VCDB
2013-01-01Community Foot ClinicInsider misuseHealthcareTX, US—VCDB
2013-01-01Dr. Sandra Bujanda-WagnerError / misconfigurationHealthcareCO, US—VCDB
2013-01-01Dr. Stephen SecundaError / misconfigurationHealthcarePA, US—VCDB
2013-01-01Eastside Medical CenterError / misconfigurationHealthcareGA, US3,000 recordsVCDB
2013-01-01Edinburgh Royal InfirmaryInsider misuseHealthcareGB1 recordsVCDB
2013-01-01El Centro Regional Medical CenterInsider misuseHealthcareCA, US501 recordsVCDB
2013-01-01Erskine Family DentistryMalwareHealthcareIN, US—VCDB
2013-01-01Family Intervention ServicesError / misconfigurationHealthcareGA, US—VCDB
2013-01-01Florida Digestive Health Specialists, LLPInsider misuseHealthcareFL, US4,400 recordsVCDB
2013-01-01Glens Falls HospitalError / misconfigurationHealthcareNY, US2,300 recordsVCDB
2013-01-01Goold Health SystemsInsider misuseHealthcareUT, US6,000 recordsVCDB
2013-01-01Head StartInsider misuseHealthcareGA, US—VCDB
2013-01-01Health CanadaError / misconfigurationHealthcareCA40k recordsVCDB
2013-01-01HealthCare for WomenHacking / intrusionHealthcareMA, 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 2026-10-15 08:57 UTC.