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: 614; last 12 months, every source
People in US health breaches: 70.5M; 478 breaches reported to HHS
Material incidents, US listed firms: 21; SEC 8-K Item 1.05, 12 months
Accounts in new breach records: 522.5M; 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 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
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

11,849 incidents, newest first.

Date	Organisation	Type of attack	Sector	Where	Affected	Source
2019-03-01	Haylands Primary School	Ransomware	Education	GB-IOW, GB	—	VCDB
2019-03-01	Healthfirst	Error / misconfiguration	Finance & Insurance	NY, US	—	VCDB
2019-03-01	King County	Insider misuse	Public Administration	WA, US	40k records	VCDB
2019-03-01	MalindoAir malindoair.com	Data breach (cause not stated)	—	—	4.3M accounts	HIBP
2019-03-01	McDonald's	Insider misuse	Accommodation & Food	MD, US	14 records	VCDB
2019-03-01	Norfolk Admirals	Hacking / intrusion	Entertainment	US-VA, US	4,400 records	VCDB
2019-03-01	St. Louis Community College	Error / misconfiguration	Education	US-MO, US	4,000 records	VCDB
2019-03-01	Unnamed organisation	Malware	Public Administration	SY	—	VCDB
2019-03-01	Unnamed organisation	Malware	Public Administration	ET	—	VCDB
2019-02-28	Estante Virtual estantevirtual.com.br	Data breach (cause not stated)	—	—	5.4M accounts	HIBP
2019-02-28	Lifebear lifebear.com	Data breach (cause not stated)	—	—	3.7M accounts	HIBP
2019-02-25	Verifications.io verifications.io	Data breach (cause not stated)	—	—	763.1M accounts	HIBP
2019-02-24	GameSalad gamesalad.com	Data breach (cause not stated)	—	—	1.5M accounts	HIBP
2019-02-20	CafePress	Hacking / intrusion	Real Estate	KY, US	23.2M records	VCDB
2019-02-20	CafePress cafepress.com	Data breach (cause not stated)	—	—	23.2M accounts	HIBP
2019-02-20	Demon Forums demonforums.net	Data breach (cause not stated)	—	—	53k accounts	HIBP
2019-02-19	Addison County Home Health & Hospice	Hacking / intrusion	Healthcare	VT, US	—	VCDB
2019-02-15	YouNow younow.com	Data breach (cause not stated)	—	—	18.2M accounts	HIBP
2019-02-14	LBB lbb.in	Data breach (cause not stated)	—	—	39k accounts	HIBP
2019-02-14	Mobile gas	Theft or loss	Retail	US-FL, US	—	VCDB
2019-02-11	Stevenage Police Department	Insider misuse	Public Administration	GB	1 records	VCDB
2019-02-08	Starling Physicians	Phishing / social engineering	Healthcare	CT, US	—	VCDB
2019-02-03	devkitPro devkitpro.org	Data breach (cause not stated)	—	—	1,508 accounts	HIBP
2019-02-01	SyncUI	Error / misconfiguration	Information	EE	2.9M records	VCDB
2019-02-01	Taco Bell	Insider misuse	Accommodation & Food	US-CA, US	—	VCDB
2019-02-01	Toyota	Hacking / intrusion	Manufacturing	JP	3.1M records	VCDB
2019-02-01	intuit	Hacking / intrusion	Information	US	—	VCDB
2019-01-31	Youthmanual youthmanual.com	Data breach (cause not stated)	—	—	938k accounts	HIBP
2019-01-29	Unnamed organisation	Error / misconfiguration	Finance & Insurance	CA, US	6.7M records	VCDB
2019-01-20	Peatix peatix.com	Data breach (cause not stated)	—	—	4.2M accounts	HIBP
2019-01-18	RupeeRedee	Error / misconfiguration	Finance & Insurance	IN-HR, IN	—	VCDB
2019-01-10	whatsapp	Error / misconfiguration	Information	US-CA, US	1 records	VCDB
2019-01-09	Columbia Surgical Specialists	Ransomware	Healthcare	WA, US	400k records	VCDB
2019-01-07	Collection #1	Credential compilation (no single victim)	—	—	772.9M accounts	HIBP
2019-01-03	North Country Business Products, Inc.	Malware	Information	AZ, US	—	VCDB
2019-01-03	ixigo ixigo.com	Data breach (cause not stated)	—	—	17.2M accounts	HIBP
2019-01-01	Kent County Council	Error / misconfiguration	Public Administration	GB	—	VCDB
2019-01-01	AMC Network	Error / misconfiguration	Information	NY, US	1.6M records	VCDB
2019-01-01	Advanz Pharma	Insider misuse	Manufacturing	CA	—	VCDB
2019-01-01	Advocate Christ Medical Center	Error / misconfiguration	Healthcare	US-IL, US	1 records	VCDB
2019-01-01	All India Chess Federation	Insider misuse	Entertainment	IN	—	VCDB
2019-01-01	Anytime Fitness	Insider misuse	Entertainment	AZ, US	—	VCDB
2019-01-01	ApexSMS	Error / misconfiguration	Professional Services	US	80.0M records	VCDB
2019-01-01	Armor Games armorgames.com	Data breach (cause not stated)	—	—	10.6M accounts	HIBP
2019-01-01	Army and Air Force Exchange	Insider misuse	Retail	GU	1 records	VCDB
2019-01-01	Authentic Jobs	Error / misconfiguration	Information	FL, US	221k records	VCDB
2019-01-01	Bank of Cardiff	Error / misconfiguration	Finance & Insurance	US	100.0M records	VCDB
2019-01-01	Belfast health trust	Error / misconfiguration	Healthcare	IE	—	VCDB
2019-01-01	Boy Scouts of America	Error / misconfiguration	Other Services	TX, UM	—	VCDB
2019-01-01	Bradford Royal Infirmary	Insider misuse	Healthcare	GB	—	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 2026-10-16 20:13 UTC.