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	Hillsborough County	Ransomware	Public Administration	FL, US	70k records	VCDB
2023-06-01	Hilltop Holdings Inc.	Ransomware	Finance & Insurance	TX, US	—	VCDB
2023-06-01	Horizon Bank	Ransomware	Finance & Insurance	IN, US	—	VCDB
2023-06-01	Humana	Ransomware	Finance & Insurance	KY, US	—	VCDB
2023-06-01	ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI	Ransomware	Education	NY, US	—	VCDB
2023-06-01	ILLINOIS COLLEGE	Ransomware	Education	IL, US	—	VCDB
2023-06-01	ILLINOIS EASTERN C C	Ransomware	Education	IL, US	—	VCDB
2023-06-01	ILLINOIS STUDENT ASSISTANCE COMMISSION	Ransomware	Education	IL, US	—	VCDB
2023-06-01	INDIAN HILLS COMMUNITY COLLEGE	Ransomware	Education	IA, US	—	VCDB
2023-06-01	INTERDENOMINATIONAL THEOLOGICAL	Ransomware	Education	GA, US	—	VCDB
2023-06-01	INVER HILLS COMMUNITY COLLEGE	Ransomware	Education	MN, US	—	VCDB
2023-06-01	IRVINE VALLEY COLLEGE	Ransomware	Education	CA, US	—	VCDB
2023-06-01	Idaho State University	Ransomware	Education	ID, US	—	VCDB
2023-06-01	Illumifin Corporation	Ransomware	Finance & Insurance	SC, US	—	VCDB
2023-06-01	J F DRAKE STATE TECHNICAL COLLEGE	Ransomware	Education	AL, US	—	VCDB
2023-06-01	JACKSON COLLEGE	Ransomware	Education	MI, US	—	VCDB
2023-06-01	JACKSON STATE COMMUNITY COLLEGE	Ransomware	Education	TN, US	—	VCDB
2023-06-01	JACKSON STATE UNIVERSITY	Ransomware	Education	MS, US	—	VCDB
2023-06-01	JAMES MADISON UNIVERSITY	Ransomware	Education	VA, US	—	VCDB
2023-06-01	JEFFERSON COLLEGE	Ransomware	Education	MO, US	—	VCDB
2023-06-01	JOHN CARROLL UNIVERSITY	Ransomware	Education	OH, US	—	VCDB
2023-06-01	JOHNSTON COMMUNITY COLLEGE	Ransomware	Education	NC, US	—	VCDB
2023-06-01	Jackson Financial Inc.	Ransomware	Finance & Insurance	MI, US	—	VCDB
2023-06-01	Johns Hopkins University	Ransomware	Education	MD, US	—	VCDB
2023-06-01	KELLOGG COMMUNITY COLLEGE	Ransomware	Education	MI, US	—	VCDB
2023-06-01	KENNESAW STATE UNIVERSITY	Ransomware	Education	GA, US	—	VCDB
2023-06-01	KENT STATE UNIVERSITY	Ransomware	Education	OH, US	—	VCDB
2023-06-01	KEYBANK NATIONAL ASSOCIATION	Ransomware	Finance & Insurance	OH, US	—	VCDB
2023-06-01	KING’S COLLEGE	Ransomware	Education	PA, US	—	VCDB
2023-06-01	KIPP Public Schools	Ransomware	Education	CA, US	—	VCDB
2023-06-01	KIRKWOOD COMMUNITY COLLEGE	Ransomware	Education	IA, US	—	VCDB
2023-06-01	KLAMATH COMMUNITY COLLEGE	Ransomware	Education	OR, US	—	VCDB
2023-06-01	KPMG	Ransomware	Professional Services	NY, US	—	VCDB
2023-06-01	Kvictim_id_valueL Gates	Ransomware	Professional Services	CA, US	—	VCDB
2023-06-01	LAGRANGE COLLEGE	Ransomware	Education	GA, US	—	VCDB
2023-06-01	LAKE SUPERIOR STATE UNIVERSITY	Ransomware	Education	MI, US	—	VCDB
2023-06-01	LAKE-SUMTER STATE COLLEGE	Ransomware	Education	FL, US	—	VCDB
2023-06-01	LAKESHORE TECHNICAL COLLEGE	Ransomware	Education	WI, US	—	VCDB
2023-06-01	LANE COLLEGE	Ransomware	Education	TN, US	—	VCDB
2023-06-01	LARAMIE COUNTY COMMUNITY COLLEGE	Ransomware	Education	WY, US	—	VCDB
2023-06-01	LE MOYNE COLLEGE	Ransomware	Education	NY, US	—	VCDB
2023-06-01	LEHIGH CARBON COMMUNITY COLLEGE	Ransomware	Education	PA, US	—	VCDB
2023-06-01	LEHIGH UNIVERSITY	Ransomware	Education	PA, US	—	VCDB
2023-06-01	LENOIR COMMUNITY COLLEGE	Ransomware	Education	NC, US	—	VCDB
2023-06-01	LEWIS-CLARK STATE COLLEGE	Ransomware	Education	ID, US	—	VCDB
2023-06-01	LINDENWOOD UNIVERSITY	Ransomware	Education	MO, US	—	VCDB
2023-06-01	LONE STAR COLLEGE SYSTEM DISTRICT	Ransomware	Education	TX, US	—	VCDB
2023-06-01	LONG ISLAND UNIVERSITY	Ransomware	Education	NY, US	—	VCDB
2023-06-01	LONGWOOD UNIVERSITY	Ransomware	Education	VA, US	—	VCDB
2023-06-01	LOUISIANA STATE UNIVERSITY	Ransomware	Education	LA, 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 16:50 UTC.