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: 618; last 12 months, every source
People in US health breaches: 70.5M; 477 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 sectorHealthcare754 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

2Trends

The last 24 months, dated when the incident happened where the source says, otherwise when it was reported.

Disclosed incidents per month, by type of attackStacked: each band is one type; the top edge is the month's total.

Hacking / intrusion797
Data breach (cause not stated)151
Unauthorised access or disclosure62
Ransomware9
Credential compilation (no single victim)5
Infostealer logs5
Theft or loss4
Error / misconfiguration1

Hacking / intrusion797
Data breach (cause not stated)151
Unauthorised access or disclosure62
Ransomware9
Credential compilation (no single victim)5
Infostealer logs5
Theft or loss4
Error / misconfiguration1

Hacking / intrusion797
Data breach (cause not stated)151
Unauthorised access or disclosure62
Ransomware9
Credential compilation (no single victim)5
Infostealer logs5
Theft or loss4
Error / misconfiguration1

People affected per monthBreaches counted in people (US health breaches and coded incidents).

By type of attack

Hacking / intrusion77%
Data breach (cause not stated)15%
Unauthorised access or disclosure6%
Ransomware1%
Credential compilation (no single victim)0%
Infostealer logs0%
Theft or loss0%
Error / misconfiguration0%

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.

Sector against type of attackIncidents per sector (rows) and attack type (columns). Darker means more.

In healthcare, 91% of incidents were hacking / intrusion.

	Hacking / intrusion	Unauthorised access or disclosure	Ransomware	Theft or loss	Error / misconfiguration
Healthcare	685	62	2	4	1
Information	25		3
Manufacturing	20		1
Professional Services	18		1
Retail	17		1
Finance, Insurance & Real Estate	6
Services	5
Technology	4

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
Conduent Business Services LLC62.2M people
8 Oct 2025 · Hacking / intrusion · Healthcare · HHS
2
DentaQuest, LLC15.0M people
16 Jul 2026 · Hacking / intrusion · Healthcare · HHS
3
Aflac Incorporated (“Aflac”)13.9M people
8 Aug 2025 · Hacking / intrusion · Healthcare · HHS
4
Aesto, LLC9.5M people
31 Jul 2026 · Hacking / intrusion · Healthcare · HHS
5
Episource, LLC6.7M people
6 Jun 2025 · Hacking / intrusion · Healthcare · HHS
6
AdaptHealth, LLC4.1M people
14 Aug 2026 · Hacking / intrusion · Healthcare · HHS
7
Unlimited Technology Systems, LLC3.8M people
21 Jul 2026 · Hacking / intrusion · Healthcare · HHS
8
CareCloud, Inc.3.8M people
24 Jul 2026 · Hacking / intrusion · Healthcare · HHS

By accounts exposed

1
1win96.2M accounts
2 Nov 2024 · Data breach (cause not stated) · HIBP
2
Under Armour72.7M accounts
17 Nov 2025 · Data breach (cause not stated) · HIBP
3
Suno55.3M accounts
25 Nov 2025 · Data breach (cause not stated) · HIBP
4
Canadian Tire38.3M accounts
2 Oct 2025 · Data breach (cause not stated) · HIBP
5
Addi34.5M accounts
25 Mar 2026 · Data breach (cause not stated) · HIBP
6
SoundCloud29.8M accounts
15 Dec 2025 · Data breach (cause not stated) · HIBP
7
Speedio27.5M accounts
24 Dec 2024 · Data breach (cause not stated) · HIBP
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.

Organisation	Disclosures	First – latest	Types of attack	Sources
Fieldtex Products, Inc. · Healthcare	5	20 Nov 2025 – 12 Dec 2025	Hacking / intrusion	HHS
AltaMed Health Services Corporation · Healthcare	3	1 Jun 2023 – 26 Feb 2026	Hacking / intrusionRansomwareUnauthorised access or disclosure	HHS, VCDB
United Healthcare Student Resources · Finance & Insurance	3	1 Jun 2023 – 1 Jun 2023	Ransomware	VCDB
DentaQuest, LLC · Healthcare	2	23 May 2026 – 16 Jul 2026	Data breach (cause not stated)Hacking / intrusion	HHS, HIBP
CarMax · Retail	2	2 May 2025 – 24 Jan 2026	Data breach (cause not stated)Hacking / intrusion	HIBP, VCDB
Park Dental Partners, Inc. · Healthcare	2	28 Aug 2026 – 7 Oct 2026	Hacking / intrusion	SEC 8-K
WindRose Health Network · Healthcare	2	27 Jan 2026 – 16 Sept 2026	Hacking / intrusion	HHS
AdaptHealth, LLC · Healthcare	2	27 Jun 2026 – 14 Aug 2026	Hacking / intrusion	HHS, SEC 8-K
CareCloud, Inc. · Healthcare	2	24 Mar 2026 – 24 Jul 2026	Hacking / intrusion	HHS, SEC 8-K
Clinical Registry Solutions · Healthcare	2	9 Apr 2026 – 12 Jun 2026	Hacking / intrusion	HHS, VCDB
Open Arms Care Corporation · Healthcare	2	1 Jun 2025 – 11 Jun 2026	Hacking / intrusion	HHS, VCDB
Gastro Health · Healthcare	2	22 May 2026 – 22 May 2026	Hacking / intrusion	HHS

6All incidents

11,847 incidents, newest first.

Date	Organisation	Type of attack	Sector	Where	Affected	Source
2023-06-01	COLLIN COUNTY COMMUNITY COLLEGE	Ransomware	Education	TX, US	—	VCDB
2023-06-01	COLORADO MESA UNIVERSITY	Ransomware	Education	CO, US	—	VCDB
2023-06-01	COLORADO MOUNTAIN COLLEGE	Ransomware	Education	CO, US	—	VCDB
2023-06-01	COLUMBIA STATE COMMUNITY COLLEGE	Ransomware	Education	CO, US	—	VCDB
2023-06-01	COMMUNITY COLLEGE OF PHILADELPHIA	Ransomware	Education	PA, US	—	VCDB
2023-06-01	COMMUNITY COLLEGE OF VERMONT	Ransomware	Education	VT, US	—	VCDB
2023-06-01	CONCORD UNIVERSITY	Ransomware	Education	WV, US	—	VCDB
2023-06-01	CONCORDIA UNIVERSITY	Ransomware	Education	CA, US	—	VCDB
2023-06-01	CORNELL UNIVERSITY	Ransomware	Education	NY, US	—	VCDB
2023-06-01	COWLEY COUNTY COMMUNITY JUNIOR	Ransomware	Education	KS, US	—	VCDB
2023-06-01	CRAVEN COMMUNITY COLLEGE	Ransomware	Education	NC, US	—	VCDB
2023-06-01	CREIGHTON UNIVERSITY	Ransomware	Education	NE, US	—	VCDB
2023-06-01	CU*Answers	Ransomware	Retail	MI, US	—	VCDB
2023-06-01	CUNY BRONX COMMUNITY COLLEGE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUNY BROOKLYN COLLEGE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUNY CITY COLLEGE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUNY GRADUATE SCHOOL AND UNIVERSITY CENTER	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUNY JOHN JAY COLLEGE OF CRIMINAL JUSTICE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUNY KINGSBOROUGH COMMUNITY COLLEGE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUNY LAGUARDIA COMMUNITY COLLEGE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUNY LEHMAN COLLEGE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUNY MEDGAR EVERS COLLEGE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUNY QUEENS COLLEGE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUNY QUEENSBOROUGH COMMUNITY COLLEGE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUNY YORK COLLEGE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	CUYAHOGA COMMUNITY COLLEGE	Ransomware	Education	OH, US	—	VCDB
2023-06-01	CUYAMACA COLLEGE	Ransomware	Education	CA, US	—	VCDB
2023-06-01	Cadence Bank	Ransomware	Finance & Insurance	MS, US	—	VCDB
2023-06-01	CalPERS	Ransomware	Finance & Insurance	CA, US	—	VCDB
2023-06-01	Care N' Care Insurance Company	Ransomware	Finance & Insurance	TX, US	—	VCDB
2023-06-01	CareSource	Ransomware	Finance & Insurance	OH, US	—	VCDB
2023-06-01	Cedarville University	Ransomware	Education	OH, US	—	VCDB
2023-06-01	Chesapeake College	Ransomware	Education	MD, US	—	VCDB
2023-06-01	Ciena	Ransomware	Information	MD, US	—	VCDB
2023-06-01	Clear Spring Life and Annuity Company	Ransomware	Finance & Insurance	IN, US	—	VCDB
2023-06-01	Clorox	Ransomware	Manufacturing	CA, US	—	VCDB
2023-06-01	Colony Bank	Ransomware	Finance & Insurance	GA, US	—	VCDB
2023-06-01	Colorado Department of Health Care Policy victim_id_value Financing	Ransomware	Public Administration	CO, US	4.1M records	VCDB
2023-06-01	Columbia Banking System	Ransomware	Finance & Insurance	US	—	VCDB
2023-06-01	Corebridge Financial	Ransomware	Finance & Insurance	US	—	VCDB
2023-06-01	County of Santa Clara	Ransomware	Public Administration	CA, US	13k records	VCDB
2023-06-01	Cree Lighting	Ransomware	Wholesale	WI, US	—	VCDB
2023-06-01	Crowe	Ransomware	Professional Services	IL, US	—	VCDB
2023-06-01	DALLAS THEOLOGICAL SEMINARY	Ransomware	Education	TX, US	—	VCDB
2023-06-01	DARTMOUTH COLLEGE	Ransomware	Education	NH, US	—	VCDB
2023-06-01	DAVIDSON COLLEGE	Ransomware	Education	NC, US	—	VCDB
2023-06-01	DAVIDSON-DAVIE COMMUNITY COLLEGE	Ransomware	Education	NC, US	—	VCDB
2023-06-01	DE ANZA COLLEGE	Ransomware	Education	CA, US	—	VCDB
2023-06-01	DELAWARE TECHNICAL AND COMMUNITY – TERRY	Ransomware	Education	DE, US	—	VCDB
2023-06-01	DELAWARE VALLEY UNIVERSITY	Ransomware	Education	DE, 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 14:13 UTC.