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
474 breaches reported to HHS
Material incidents, US listed firms
22
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 sectorHealthcare747 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 disclosureDouble CounterData breach (cause not stated) · 4 Oct 2026 · HIBP

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. Healthcare747
  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
Healthcare68060241
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 (29 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
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
Radiology Associates of Richmond · Healthcare21 Jul 2025 – 21 May 2026Hacking / intrusionHHS

6All incidents

Clear

438 incidents match, newest first.

DateOrganisationType of attackSectorWhereAffectedSource
2015-10-11Rapid7Phishing / social engineeringProfessional ServicesMA, US—VCDB
2015-10-01Citrix Hacking / intrusionProfessional ServicesFL, US—VCDB
2015-10-01Daffodil Software LtdInsider misuseProfessional ServicesIN—VCDB
2015-08-06Huntington Medical Research InstitutesError / misconfigurationProfessional ServicesCA, US—VCDB
2015-08-03Wheeler & Egger CPA'sMalwareProfessional ServicesCA, US45 recordsVCDB
2015-08-01CiscoError / misconfigurationProfessional ServicesCA, US—VCDB
2015-07-31Huntington Medical Research InstitutesInsider misuseProfessional ServicesCA, US4,300 recordsVCDB
2015-07-26Marin Medical Practices ConceptsRansomwareProfessional ServicesCA, US—VCDB
2015-07-08SAG Health PlanPhishing / social engineeringProfessional ServicesCA, US—VCDB
2015-07-02OneLoginHacking / intrusionProfessional ServicesCA, US—VCDB
2015-06-15Law offices of Higgins, Harrell and ClarkeInsider misuseProfessional ServicesTX, US—VCDB
2015-05-07Medical Informatics EngineeringHacking / intrusionProfessional ServicesIN, US3.9M recordsVCDB
2015-05-01Internal Reveune SerivceMalwareProfessional ServicesUS101k recordsVCDB
2015-04-23Atkinson, Andelson, Loya, Ruud & RomoError / misconfigurationProfessional ServicesCA, US—VCDB
2015-04-01Pomeroy Investment CorporationPhishing / social engineeringProfessional ServicesMI, US—VCDB
2015-03-22Linux AustraliaHacking / intrusionProfessional ServicesAU—VCDB
2015-03-01ITBusInsider misuseProfessional ServicesGB—VCDB
2015-03-01LoopPayMalwareProfessional ServicesMA, US—VCDB
2015-02-01SA HealthInsider misuseProfessional ServicesAU9 recordsVCDB
2015-02-01Slack TechnologiesHacking / intrusionProfessional ServicesCA, US50k recordsVCDB
2015-01-15General Genetics CorpError / misconfigurationProfessional ServicesNM, US6,000 recordsVCDB
2015-01-01Acclaim Technical Services, Inc.MalwareProfessional ServicesVA, US—VCDB
2015-01-01Bothwell Bracker'sInsider misuseProfessional ServicesGA, US1,000 recordsVCDB
2015-01-01DXC TechnologyError / misconfigurationProfessional ServicesDK1.2M recordsVCDB
2015-01-01EWSInsider misuseProfessional ServicesMO, US—VCDB
2015-01-01EmailmoversInsider misuseProfessional ServicesGB2.8M recordsVCDB
2015-01-01Lynn Talbot Jr, CPAMalwareProfessional ServicesCA, US—VCDB
2015-01-01Medvet LaboratoriesError / misconfigurationProfessional ServicesAU800 recordsVCDB
2015-01-01Mossack FonsecaHacking / intrusionProfessional ServicesPA11.5M recordsVCDB
2015-01-01NGP VANError / misconfigurationProfessional ServicesDC, US—VCDB
2015-01-01Reyes & BarsoumHacking / intrusionProfessional ServicesCA, US33k recordsVCDB
2015-01-01SageUnknownProfessional ServicesGB—VCDB
2015-01-01SensisError / misconfigurationProfessional ServicesAU230 recordsVCDB
2015-01-01Ubiquiti Networks Inc.Phishing / social engineeringProfessional ServicesCA, US—VCDB
2015-01-01UnknownHacking / intrusionProfessional ServicesGA, US—VCDB
2015-01-01Xytex CorpError / misconfigurationProfessional ServicesGA, US1 recordsVCDB
2014-11-10Acosta IncTheft or lossProfessional ServicesFL, US—VCDB
2014-06-16Signature SystemsMalwareProfessional ServicesPA, US—VCDB
2014-06-06MAXIMUS IncInsider misuseProfessional ServicesCT, US400 recordsVCDB
2014-06-01LANDESKMalwareProfessional ServicesUT, US—VCDB
2014-05-22New Zealand National Institute of Water and Atmospheric ResearchHacking / intrusionProfessional ServicesWellington, NZ—VCDB
2014-05-01H&R Block IncTheft or lossProfessional ServicesFL, US—VCDB
2014-04-06Greene's AccountingTheft or lossProfessional ServicesUS—VCDB
2014-04-06New Era Photography and FilmHacking / intrusionProfessional ServicesAU—VCDB
2014-04-01BlockchainHacking / intrusionProfessional ServicesGB—VCDB
2014-04-01Reyes & Barsoum L.L.PHacking / intrusionProfessional ServicesCA, US33k recordsVCDB
2014-04-01Typepad / Say MediaHacking / intrusionProfessional ServicesCA, US—VCDB
2014-03-01Century IIInsider misuseProfessional ServicesTN, US—VCDB
2014-02-28VGM HomelinkError / misconfigurationProfessional ServicesIA, US1,400 recordsVCDB
2014-02-06Clinical Research LaboratoryError / misconfigurationProfessional ServicesKS, 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 2026-10-13 18:58 UTC.