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; 473 breaches reported to HHS
Material incidents, US listed firms: 23; 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 sectorHealthcare748 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 / intrusion793
Data breach (cause not stated)150
Unauthorised access or disclosure60
Ransomware9
Credential compilation (no single victim)5
Infostealer logs5
Theft or loss4
Error / misconfiguration1

Hacking / intrusion793
Data breach (cause not stated)150
Unauthorised access or disclosure60
Ransomware9
Credential compilation (no single victim)5
Infostealer logs5
Theft or loss4
Error / misconfiguration1

Hacking / intrusion793
Data breach (cause not stated)150
Unauthorised access or disclosure60
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	681	60	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

805 incidents match, newest first.

Date	Organisation	Type of attack	Sector	Where	Affected	Source
2011-11-01	Nexon Korea Corporation	Hacking / intrusion	Information	KR	13.2M records	VCDB
2011-10-28	Guide Publishing Group, Inc.	Hacking / intrusion	Information	US	—	VCDB
2011-07-18	SK Communications Co., Ltd.	Malware	Information	KR	35.0M records	VCDB
2011-06-15	Fling.com	Hacking / intrusion	Information	GB	40.0M records	VCDB
2011-06-01	Sony Pictures Entertainment Inc.	Hacking / intrusion	Information	CA, US	1.0M records	VCDB
2011-06-01	Zocdoc	Error / misconfiguration	Information	NY, US	—	VCDB
2011-04-17	Sony Online Entertainment LLC	Hacking / intrusion	Information	CA, US	77.0M records	VCDB
2011-04-16	Sony Online Entertainment	Hacking / intrusion	Information	CA, US	2.5M records	VCDB
2011-04-01	Ashampoo	Hacking / intrusion	Information	DE	14.0M records	VCDB
2011-01-01	Elsevier	Insider misuse	Information	NL	—	VCDB
2011-01-01	Enki Corp	Insider misuse	Information	CO, US	—	VCDB
2011-01-01	Facebook	Unknown	Information	CA, US	—	VCDB
2011-01-01	Hakin9	Hacking / intrusion	Information	PL	—	VCDB
2011-01-01	SEGA Corporation	Hacking / intrusion	Information	JP	1.3M records	VCDB
2011-01-01	Square Enix Holdings Co Ltd	Hacking / intrusion	Information	JP	1.8M records	VCDB
2011-01-01	Telecomm	Unknown	Information	NZ	2.1M records	VCDB
2011-01-01	Tencent Holdings Limited	Hacking / intrusion	Information	CN	12.0B records	VCDB
2011-01-01	Unknown	Insider misuse	Information	KP	27.0M records	VCDB
2011-01-01	Zocdoc	Error / misconfiguration	Information	US	—	VCDB
2010-12-01	Los Angeles Times	Insider misuse	Information	CA, US	—	VCDB
2010-11-01	Gawker Media	Hacking / intrusion	Information	NY, US	1.5M records	VCDB
2010-01-01	Belgacom SA	Malware	Information	BE	—	VCDB
2010-01-01	Belgacom SA	Malware	Information	BE	—	VCDB
2010-01-01	GreenNet	Malware	Information	GB	—	VCDB
2010-01-01	Greenhost	Malware	Information	NL	—	VCDB
2010-01-01	Jinbonet	Malware	Information	KR	—	VCDB
2010-01-01	Mango	Malware	Information	ZW	—	VCDB
2010-01-01	May First/People Link	Malware	Information	US	—	VCDB
2010-01-01	PA Online	Malware	Information	PA, US	—	VCDB
2010-01-01	Riseup	Malware	Information	US	—	VCDB
2010-01-01	Tribune Co.	Hacking / intrusion	Information	CA, US	—	VCDB
2009-12-01	Adobe	Malware	Information	CA, US	—	VCDB
2009-12-01	Google Inc.	Malware	Information	CA, US	—	VCDB
2009-12-01	Rackspace Hosting, Inc.	Malware	Information	TX, US	—	VCDB
2009-12-01	Symantec Corporation	Malware	Information	CA, US	—	VCDB
2009-12-01	Yahoo! Inc.	Malware	Information	CA, US	—	VCDB
2009-04-01	Unnamed organisation	Error / misconfiguration	Information	NZ	1 records	VCDB
2009-02-01	Verizon Communications Inc	Insider misuse	Information	PA, US	—	VCDB
2009-01-01	RockYou	Hacking / intrusion	Information	CA, US	32.0M records	VCDB
2008-12-02	CHECKFREE SERVICES CORPORATION	Hacking / intrusion	Information	GA, US	—	VCDB
2008-12-02	CheckFree Services Corporation	Hacking / intrusion	Information	GA, US	5.0M records	VCDB
2008-11-01	Verizon Communications Inc	Insider misuse	Information	NY, US	—	VCDB
2008-10-17	ZYACORP ENTERTAINMENT I, LLC	Unknown	Information	NH, US	56 records	VCDB
2008-01-01	Bell Canada	Hacking / intrusion	Information	CA	3.4M records	VCDB
2008-01-01	T-Mobile US Inc	Theft or loss	Information	Unknown	17.0M records	VCDB
2008-01-01	Yahoo! Inc	Theft or loss	Information	US	1.8M records	VCDB
2006-08-01	America OnLine (AOL)	Error / misconfiguration	Information	NY, US	20.0M records	VCDB
2006-07-01	America OnLine (AOL)	Insider misuse	Information	VA, US	—	VCDB
2006-05-22	Suddenlink Communications	Insider misuse	Information	MO, US	—	VCDB
2006-05-01	KDDI Corp	Unknown	Information	JP	4.0M records	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 2026-10-14 04:59 UTC.