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: 70.5M; 477 breaches reported to HHS
Material incidents, US listed firms: 21; SEC 8-K Item 1.05, 12 months
Accounts in new breach records: 504.9M; 124 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 sectorHealthcare756 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 / intrusion799
Data breach (cause not stated)151
Unauthorised access or disclosure62
Ransomware9
Infostealer logs5
Credential compilation (no single victim)5
Theft or loss4
Error / misconfiguration1

Hacking / intrusion799
Data breach (cause not stated)151
Unauthorised access or disclosure62
Ransomware9
Infostealer logs5
Credential compilation (no single victim)5
Theft or loss4
Error / misconfiguration1

Hacking / intrusion799
Data breach (cause not stated)151
Unauthorised access or disclosure62
Ransomware9
Infostealer logs5
Credential compilation (no single victim)5
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%
Infostealer logs0%
Credential compilation (no single victim)0%
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	687	62	2	4	1
Information	25		3
Manufacturing	20		1
Professional Services	18		1
Retail	17		1
Finance, Insurance & Real Estate	6
Services	5
Transportation	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

11,849 incidents, newest first.

Date	Organisation	Type of attack	Sector	Where	Affected	Source
2016-11-12	Asda Superstore	Theft or loss	Retail	GB	—	VCDB
2016-11-12	Central DuPage Hospital	Hacking / intrusion	Healthcare	IL, US	1 records	VCDB
2016-11-10	Psychological & Counseling Center	Error / misconfiguration	Healthcare	TN, US	468 records	VCDB
2016-11-08	DemocraticUnderground.com's forums	Hacking / intrusion	Information	US	75k records	VCDB
2016-11-06	Meigs County EMS	Ransomware	Healthcare	OH, US	—	VCDB
2016-11-06	Scottland Yards Website	Hacking / intrusion	Information	GB	—	VCDB
2016-11-05	Madison County	Ransomware	Public Administration	IN, US	—	VCDB
2016-11-04	Casino Rama	Hacking / intrusion	Accommodation & Food	CA	—	VCDB
2016-11-04	Shiseido Co Ltd	Hacking / intrusion	Wholesale	JP	420k records	VCDB
2016-11-04	Touchnote	Hacking / intrusion	Information	GB	—	VCDB
2016-11-03	AliExpress	Error / misconfiguration	Information	IL	—	VCDB
2016-11-03	Novopay	Error / misconfiguration	Professional Services	NZ	530 records	VCDB
2016-11-03	University of Wisconsin-Madison Law School	Hacking / intrusion	Education	WI, US	1,213 records	VCDB
2016-11-01	Berkshire Medical Center	Insider misuse	Healthcare	MA, US	1,745 records	VCDB
2016-11-01	Best Health Physical Therapy, LLC (Best Health)	Hacking / intrusion	Healthcare	Connecticut, US	—	VCDB
2016-11-01	Chicago Public Schools	Insider misuse	Education	Illinois, US	—	VCDB
2016-11-01	City of Ottowa	Error / misconfiguration	Public Administration	Unknown	12 records	VCDB
2016-11-01	East Valley Community Health Center	Ransomware	Healthcare	CA, US	—	VCDB
2016-11-01	Eastside Medical Clinic	Insider misuse	Healthcare	CA	18 records	VCDB
2016-11-01	Horizon Blue Cross Blue Shield of New Jersey	Error / misconfiguration	Finance & Insurance	NJ, US	170k records	VCDB
2016-11-01	Michael Page	Error / misconfiguration	Administrative	GB	700k records	VCDB
2016-11-01	National Works Agency	Theft or loss	Public Administration	JM	—	VCDB
2016-11-01	New Zealand Nurses Organisation	Phishing / social engineering	Other Services	NZ	47k records	VCDB
2016-11-01	Princeton Pain Managment	Hacking / intrusion	Healthcare	NJ, US	4,668 records	VCDB
2016-11-01	Silver Cross Hospital	Error / misconfiguration	Healthcare	IL, US	8,862 records	VCDB
2016-11-01	SubaGames subagames.com	Data breach (cause not stated)	—	—	6.1M accounts	HIBP
2016-11-01	Unnamed organisation	Insider misuse	Healthcare	MO, US	1 records	VCDB
2016-11-01	Zendesk	Hacking / intrusion	Professional Services	CA, US	10k records	VCDB
2016-10-31	Circle K	Theft or loss	Retail	MO, US	—	VCDB
2016-10-31	Horizon Blue Cross Blue Shield of New Jersey	Error / misconfiguration	Finance & Insurance	NJ, US	170k records	VCDB
2016-10-31	NHS Trust	Malware	Healthcare	GB	—	VCDB
2016-10-30	Goole NHS Foundation Trust	Ransomware	Healthcare	GB	—	VCDB
2016-10-30	Lincolnshire NHS Trust	Ransomware	Healthcare	GB	—	VCDB
2016-10-27	MCBans mcbans.com	Data breach (cause not stated)	—	—	120k accounts	HIBP
2016-10-26	Cellebrite	Error / misconfiguration	Manufacturing	IL	—	VCDB
2016-10-26	campaign office	Theft or loss	Public Administration	CA, US	—	VCDB
2016-10-25	Arby's	Malware	Accommodation & Food	US	355k records	VCDB
2016-10-25	Brandywine Pediatrics, P.A.	Ransomware	Healthcare	DE, US	27k records	VCDB
2016-10-24	Centrelink	Error / misconfiguration	Public Administration	AU	—	VCDB
2016-10-22	Henry County Health Department	Theft or loss	Public Administration	OH, US	560 records	VCDB
2016-10-21	Great American PAC	Error / misconfiguration	Other Services	US	49 records	VCDB
2016-10-20	Blue Moon Deli	Theft or loss	Accommodation & Food	NY, US	—	VCDB
2016-10-20	Dailymotion dailymotion.com	Data breach (cause not stated)	—	—	85.2M accounts	HIBP
2016-10-20	Dailymotion	Hacking / intrusion	Information	FR	87.0M records	VCDB
2016-10-19	Ohio State Police	Insider misuse	Public Administration	OH, US	—	VCDB
2016-10-18	Primark	Theft or loss	Manufacturing	PA, US	—	VCDB
2016-10-16	Adult FriendFinder (2016) adultfriendfinder.com	Data breach (cause not stated)	—	—	169.7M accounts	HIBP
2016-10-15	Skin Cancer Specialists, P.C.	Hacking / intrusion	Healthcare	GA, US	3,365 records	VCDB
2016-10-14	Jammu and Kashmir police	Phishing / social engineering	Public Administration	IN	—	VCDB
2016-10-13	Exploit.In	Credential compilation (no single victim)	—	—	593.4M accounts	HIBP

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 2026-10-17 18:20 UTC.