List of data breaches

This is a list of data breaches, using data compiled from various sources, including press reports, government news releases, and mainstream news articles. The list includes those involving the theft or compromise of 30,000 or more records, although many smaller breaches occur continually. Breaches of large organizations where the number of records is still unknown are also listed. In addition, the various methods used in the breaches are listed, with hacking being the most common.

For broader coverage of this topic, see Data breach.
For broader coverage of this topic, see List of security hacking incidents.

Most reported breaches are in North America, at least in part because of relatively strict disclosure laws in North American countries. 95% of data breaches come from government, retail, or technology industries.[1] It is estimated that the average cost of a data breach will be over $150 million by 2020, with the global annual cost forecast to be $2.1 trillion.[2][3] As a result of data breaches, it is estimated that in first half of 2018 alone, about 4.5 billion records were exposed.[4] In 2019, a collection of 2.7 billion identity records, consisting of 774 million unique email addresses and 21 million unique passwords, was posted on the web for sale.[5]

EntityYear RecordsOrganization typeMethodSources
21st Century Oncology 2016 2,200,000 healthcare hacked [6][7]
500px2020 14,870,304social networkinghacked[8]
Accendo Insurance Co.2020 175,350healthcarepoor security[9][10]
Adobe Systems Incorporated2013 152,000,000techhacked[11]
Adobe Inc. 2019 7,500,000 tech poor security [12][13]
Advocate Medical Group2017 4,000,000healthcarelost / stolen media[14][15]
AerServ (subsidiary of InMobi) 2018 75,000 advertising hacked [16]
Affinity Health Plan, Inc.2013 344,579healthcarelost / stolen media[17][18]
Airtel 2019 320,000,000 telecommunications poor security [19]
Air Canada 2018 20,000 transport hacked [20]
Amazon Japan G.K. 2019 unknown web accidentally published [21][22]
TD Ameritrade2005 200,000financiallost / stolen media[23]
Ancestry.com 2021 300,000 web poor security [24]
Animal Jam 2020 46,000,000 gaming hacked [25]
Ankle & Foot Center of Tampa Bay, Inc.2021 156,000healthcarehacked[26]
Anthem Inc.2015 80,000,000healthcarehacked[27][28]
AOL2004 92,000,000webinside job, hacked[29][30]
AOL2006 20,000,000webaccidentally published[31]
AOL2014 2,400,000webhacked[32]
Apple, Inc./BlueToad2021 12,367,232tech, retailaccidentally published[33]
Apple2021 275,000techhacked[34]
Apple Health Medicaid2021 91,000healthcarepoor security[35]
Ashley Madison2015 32,000,000webhacked[36]
AT&T2008 113,000telecomslost / stolen computer[37]
AT&T2010 114,000telecomshacked[38]
Atraf 2021 unknown dating hacked [39]
Auction.co.kr2008 18,000,000webhacked[40]
Australian Immigration Department2015 G20 world leadersgovernmentaccidentally published[41]
Australian National University2019 19 years of dataacademichacked[42]
Automatic Data Processing2005 125,000financialpoor security[43]
AvMed, Inc.2009 1,220,000healthcarelost / stolen computer[44]
Bailey's Inc.2015 250,000retailhacked[45]
The Bank of New York Mellon2008 12,500,000financiallost / stolen media[46]
Bangladesh Government website data breach 2023 50,000,000+ government data leak due to security vulnerabilities [47]
Bank of America 2005 1,200,000 financial lost / stolen media [48]
Barnes & Noble2012 63 storesretailhacked[49][50]
Bell Canada 2017 1,900,000 telecoms poor security [51]
Bell Canada 2018 100,000 telecoms hacked [52]
Benesse 2014 35,040,000 educational services hacked [53]
Betfair2010 2,300,000webhacked[37]
Bethesda Game Studios2011 200,000gaminghacked[54]
Bethesda Game Studios2018 gamingaccidentally published[55]
Betsson Group 2020 unknown gambling unknown [56]
Blank Media Games 2018 7,633,234 gaming hacked [57][58]
Blizzard Entertainment2012 14,000,000gaminghacked[59][60]
BlueCross BlueShield of Tennessee2009 1,023,209healthcarelost / stolen media[61]
BMO and Simplii2018 90,000bankingpoor security[62]
2018 British Airways cyberattack 2018 500,000 transport hacked [63][64][65]
British Airways2015 tens of thousandsretailhacked[66]
2019 Bulgarian revenue agency hack 2019 over 5,000,000 government hacked [67]
California Department of Child Support Services2012 800,000governmentlost / stolen media[37][68]
Canva 2019 140,000,000 web hacked [69][70][71]
Capcom 2020 350,000 game hacked [72]
Capital One 2019 106,000,000 financial unsecured S3 bucket [73][74]
CardSystems Solutions Inc.

(MasterCard, Visa, Discover Financial Services and American Express)

 2005 40,000,000financialhacked[75][76]
Cathay Pacific Airways 2018 9,400,000 transport hacked [77]
CareFirst BlueCross Blue Shield - Maryland2015 1,100,000healthcarehacked[78]
Central Coast Credit Union2016 60,000financialhacked[79]
Central Hudson Gas & Electric2013 110,000energyhacked[80]
CheckFree Corporation2009 5,000,000financialhacked[81]
Central Intelligence Agency2017 91malware toolsInternal job[82]
CheckPeople2020 56,000,000background checkunknown[83]
China Software Developer Network2011 6,000,000webhacked[84]
Chinese gaming websites (three: Duowan, 7K7K, 178.com)2011 10,000,000webhacked[85]
Citigroup2005 3,900,000financiallost / stolen media[86]
Citigroup2011 360,083financialhacked[87]
Citigroup2013 150,000financialpoor security[88]
City and Hackney Teaching Primary Care Trust2007 160,000healthcarelost / stolen media[89]
Clearview AI2020 unknown (client list)information technologyhacked[90][91][92]
Collection No. 1 2019 773,000,000 various compilation of multiple data breaches [93]
Colorado state government2010 105,470healthcarelost / stolen computer[94]
Community Health Systems2014 4,500,000healthcarehacked[95]
Philippines Commission on Elections2016 55,000,000governmenthacked
Compass Bank2007 1,000,000financialinside job[37][96]
Countrywide Financial Corp2006 2,600,000financialinside job[37]
Countrywide Financial Corp2011 2,500,000financialinside job[97]
Centers for Medicare & Medicaid Services 2018 75,000 healthcare hacked [98]
Cox Communications2016 40,000telecomshacked[99]
Crescent Health Inc., Walgreens2013 100,000healthcarelost / stolen computer[80][100]
CVS2015 millionsretailhacked[101]
CyberServe2021 1,107,034hosting providerhacked[102][103]
Dai Nippon Printing2007 8,637,405retailinside job[104]
Data Processors International
(MasterCard, Visa, Discover Financial Services and American Express)		2008 8,000,000financialhacked[105]
Defense Integrated Data Center (South Korea)2017 235 GBmilitaryhacked[106]
Dedalus Biologie (a division of Dedalus Global) 2021 500,000 health poor security [107][108]
Deloitte 2017 350 clients emails consulting, accounting poor security [109][110]
Democratic National Committee2016 19,252politicalhacked[111]
US Department of Homeland Security2016 30,000governmentpoor security[112][113]
Desjardins 2019 9,700,000 financial inside job [114]
Domino's Pizza (France)2014 600,000webhacked[115]
DoorDash2019 4,900,000webhacked[116]
UK Driving Standards Agency2007 3,000,000governmentlost / stolen media[117]
Dropbox2012 68,648,009webhacked[118]
Drupal2013 1,000,000webhacked[119]
DSW Inc. 2005 1,400,000 retail hacked [120]
Dubsmash2018 162,000,000messaging apphacked[121][8]
Dun & Bradstreet2013 1,000,000techhacked[122][123]
Duolingo 2023 2,676,696 educational services hacked [11][124]
EasyJet2019-2020 9,000,000 (approx) - basic booking, 2208 (credit card details)transporthacked[125][126]
eBay2014 145,000,000webhacked[127]
Earl Enterprises
(Buca di Beppo, Earl of Sandwich, Planet Hollywood,
Chicken Guy, Mixology, Tequila Taqueria)		2018-2019 2,000,000restauranthacked[128]
Educational Credit Management Corporation2010 3,300,000financiallost / stolen media[129]
Eisenhower Medical Center2011 514,330healthcarelost / stolen computer[130]
ElasticSearch2019 108,000,000techpoor security[131]
Embassy Cables2010 251,000governmentinside job[132]
Emergency Healthcare Physicians, Ltd.2010 180,111healthcarelost / stolen media[130][133]
Emory Healthcare2012 315,000healthcarepoor security[130]
Equifax 2017 163,119,000 financial, credit reporting poor security [134][135]
EssilorLuxottica 2021 77,093,812 healthcare, retail hacked [136][137]
European Central Bank2014 unknownfinancialhacked[138][139]
Evernote2013 50,000,000webhacked[140][141]
Evide data breach2023 1,000computer services for charitiesransomware hacked[142][143][144][145][146]
Exactis2018 340,000,000data brokerpoor security[147]
Excellus BlueCross BlueShield2015 10,000,000healthcarehacked[148]
Experian - T-Mobile US2015 15,000,000telecomshacked[149][150]
EyeWire2016 unknowntechlost / stolen computer[151]
Facebook2013 6,000,000social networkaccidentally published[152]
Facebook 2018 50,000,000 social network poor security [153][154][155][156][157][158]
Facebook 2019 540,000,000 social network poor security [159][160]
Facebook 2019 1,500,000 social network accidentally uploaded [161]
Facebook2019 267,000,000social networkpoor security[162][163]
Fast Retailing2019 461,091retailhacked[164]
Federal Reserve Bank of Cleveland2010 400,000financialhacked[37]
Fidelity National Information Services2007 8,500,000financialinside job[165]
First American Corporation 2019 885,000,000 financial service company poor security [166]
FireEye 2020 Unknown Information Security hacked [167][168][169]
Florida Department of Juvenile Justice2013 100,000governmentlost / stolen computer[80]
Friend Finder Networks2016 412,214,295webpoor security / hacked[170][171]
Funimation2016 2,500,000webhacked[172][173]
Formspring2012 420,000webaccidentally published[174]
Unknown 2020 201,000,000 personal and demographic data about residents and their properties of US Poor security [175]
Gamigo2012 8,000,000webhacked[176]
Gap Inc.2007 800,000retaillost / stolen computer[177]
Gawker2010 1,500,000webhacked[178][179]
Global Payments2012 7,000,000financialhacked[180]
Gmail2014 5,000,000webhacked[181]
Google Plus 2018 500,000 social network poor security [182][183][184]
goregrish.com2021300,000webhacked[185]
Greek government2012 9,000,000governmenthacked[186]
Grozio Chirurgija2017 25,000healthcarehacked[187][188][189]
GS Caltex2008 11,100,000energyinside job[190][191]
Gyft2016 unknownwebhacked[192][193]
Hannaford Brothers Supermarket Chain2007 4,200,000retailhacked[194]
HauteLook 2018 28,517,244 retail hacked [195][196][197]
Health Net2009 500,000healthcarelost / stolen media[198]
HCA Healthcare2023 11,270,000healthcarehacked[199]
Health Net — IBM2011 1,900,000healthcarelost / stolen media[200]
Health Sciences Authority (Singapore) 2019 808,000 healthcare poor security [201]
Health Service Executive 2021 unknown healthcare unknown [202]
Heartland2009 130,000,000financialhacked[203][204]
Heathrow Airport 2017 2.5GB transport lost / stolen media [205][206][207]
Hewlett Packard2006 200,000tech, retaillost / stolen media[208]
Hilton Hotels2014 and 2015 363,000hotelhacked[209][210]
Home Depot2014 56,000,000retailhacked[211]
Honda Canada2011 283,000retailpoor security[212]
Hyatt Hotels2015 250 locationshotelhacked[213][214]
Iberdrola 2022 1,300,000 energy poor security [215]
Instagram 2020 200,000,000 social network poor security [216]
Internal Revenue Service2015 720,000financialhacked[217][218]
International Committee of the Red Cross2022 515,000humanitarianunknown[219][220][221]
Inuvik hospital2016 6,700healthcareinside job[222]
Iranian banks (three: Saderat, Eghtesad Novin, and Saman)2012 3,000,000financialhacked[223]
Japan Pension Service2015 1,250,000special public corporationhacked[224]
Japanet Takata2004 510,000shoppinginside job[225]
Jefferson County, West Virginia2008 1,600,000governmentaccidentally published[37][226]
JP Morgan Chase2010 2,600,000financiallost / stolen media[227]
JP Morgan Chase2014 76,000,000financialhacked[228]
Justdial2019 100,000,000local searchunprotected api[229]
KDDI2006 4,000,000telecomshacked[230]
Kirkwood Community College2013 125,000academichacked[80][231]
KM.RU2016 1,500,000webhacked[232]
Koodo Mobile2020 unknownmobile carrierhacked[233]
Korea Credit Bureau2014 20,000,000financialinside job[234]
Kroll Background America2013 1,000,000techhacked[122][123]
KT Corporation2012 8,700,000telecomshacked[235][236]
LexisNexis2014 1,000,000techhacked[122][123]
Landry's, Inc.2015 500 locationsrestauranthacked[237][238]
Les Éditions Protégez-vous 2020 380,000 publisher (magazine) unknown [239]
LifeLabs2019 15,000,000healthcarehacked[240]
Lincoln Medical & Mental Health Center2010 130,495healthcarelost / stolen media[130][241]
LinkedIn, eHarmony, Last.fm2012 8,000,000webaccidentally published[242][243]
Living Social2013 50,000,000webhacked[244][245]
MacRumors.com2014 860,000webhacked[246]
Mandarin Oriental Hotels2014 10 locationshotelhacked[247][248]
Manipulated Caiman 2023 40,000,000 financial hacked [249][250]
Marriott International2018 500,000,000hotelhacked[251]
Marriott International2020 5,200,000hotelpoor security/inside job[252]
Massachusetts Government2011 210,000governmentpoor security[37]
Massive American business hack
including 7-Eleven and Nasdaq		2012 160,000,000financialhacked[253]
Medibank & AHM 2022 9,700,000 healthcare hacked [7][10][12][13]
US Medicaid2012 780,000government, healthcarehacked[37]
Medical Informatics Engineering2015 3,900,000healthcarehacked[254]
Memorial Healthcare System2011 102,153healthcarelost / stolen media[255][130]
MGM Resorts2023 10,600,000hotel/casinohacked[256]
Michaels2014 3,000,000retailhacked[257]
Microsoft2019 250,000,000 tech data exposed by misconfiguration [258]
Microsoft Exchange servers 2021 unknown software zero-day vulnerabilities [259]
Militarysingles.com2012 163,792web, militaryaccidentally published[260]
Ministry of Education (Chile)2008 6,000,000governmentaccidentally published[261][262]
Ministry of Health (Singapore) 2019 14,200 healthcare poor security/inside job [263][264]
Mitsubishi Tokyo UFJ Bank 2006 960,000 financial intentionally lost [164]
MongoDB2019 202,000,000techpoor security[265]
MongoDB2019 275,000,000techpoor security[266]
Mobile TeleSystems (MTS) 2019 100,000,000 telecommunications misconfiguration/poor security [267]
Monster.com2007 1,600,000webhacked[268]
Morgan Stanley Smith Barney2011 34,000financiallost / stolen media[37]
Morinaga Confectionery2022 1,648,922online shoppingransomware hacked[269]
Mozilla2014 76,000webpoor security[270]
MyHeritage 2018 92,283,889 genealogy unknown [271]
NASDAQ2014 unknownfinancialhacked[272]
Natural Grocers2015 93 storesretailhacked[273]
NEC Networks, LLC2021 1,600,000healthcarehacked[274]
Neiman Marcus2014 1,100,000retailhacked[275][276]
Nemours Foundation2011 1,055,489healthcarelost / stolen media[130][277]
Network Solutions2009 573,000techhacked[278][279]
New York City Health & Hospitals Corp.2010 1,700,000healthcarelost / stolen media[130]
New York State Electric & Gas2012 1,800,000energyinside job[37]
New York Taxis2014 52,000transportpoor security[280]
Nexon Korea Corp2011 13,200,000webhacked[281]
NHS2011 8,300,000healthcarelost / stolen media[282]
Nintendo (Club Nintendo)2013 240,000gaminghacked[283]
Nintendo (Nintendo Account)2020 160,000gaminghacked[284]
Nippon Television2016 430,000mediahacked[72]
Nival Networks2016 1,500,000gaminghacked[285]
Norwegian Tax Administration2008 3,950,000governmentaccidentally published[286]
Now:Pensions2020 30,000financialrogue contractor[287]
NTT Business Solutions20239,000,000telecomshacked[288]
NTT Docomo20235,960,000telecomshacked[289]
Ofcom2016 unknowntelecominside job[290]
US Office of Personnel Management2015 21,500,000governmenthacked[291][292]
Office of the Texas Attorney General2012 6,500,000governmentaccidentally published[293]
Optus 2022 9,800,000 telecommunications hacked [3]
Orbitz2018 880,000webhacked[294]
Ohio State University2010 760,000academichacked[37]
Oregon Department of Transportation2011 unknowngovernmentpoor security[37]
OVH2013 undisclosedwebhacked[295]
Patreon2015 2,300,000webhacked[296]
PayPay2020 20,076,016QR code paymentimproper setting, hacked[297]
Philippine law enforcement agencies (Philippine National Police, National Bureau of Investigation, Bureau of Internal Revenue)2023 1,279,437governmentpoor security[298]
Popsugar2018 123,857fashionhacked[299]
Premera2015 11,000,000healthcarehacked[300]
Puerto Rico Department of Health2010 515,000healthcarehacked[130]
Quest Diagnostics 2019 11,900,000 Clinical Laboratory poor security [301]
Quora 2018 100,000,000 Question & Answer hacked [302]
Rakuten 2020 1,381,735 web improper setting, hacked [297]
Rambler.ru2012 98,167,935webhacked[303][304]
RBS Worldpay2008 1,500,000financialhacked[305]
RENAPER (Argentina) 2018 45,000,000 government poor security [306][307]
Reddit 2021 unknown web hacked [308][309]
Restaurant Depot2011 200,000retailhacked[37]
RockYou!2009 32,000,000web, gaminghacked[310]
Rosen Hotels2016 unknownhotelhacked[311]
Sakai City, Japan2015 680,000governmentinside job[312]
San Francisco Public Utilities Commission2011 180,000governmenthacked[313]
Scottrade2015 4,600,000financialhacked[314]
Scribd2013 500,000webhacked[315][316]
Seacoast Radiology, PA2010 231,400healthcarehacked[130][317]
Sega2011 1,290,755gaminghacked[318]
Service NSW (New South Wales) 2020 104,000 government hacked [4]
Service Personnel and Veterans Agency (UK)2008 50,500governmentlost / stolen media[319]
ShopBack 2020 unknown tech hacked [320]
SingHealth 2018 1,500,000 government, database hacked [321]
Slack2015 500,000techpoor security[322]
SlickWraps2020 377,428phone accessoriespoor security[323]
Snapchat2013 4,700,000web, techhacked[324]
SolarWinds 2020 Source Code Compromised Network Monitoring hacked [325]
Sony Online Entertainment2011 24,600,000gaminghacked[326][327]
Sony Pictures2011 1,000,000webhacked[328]
Sony Pictures2014 100 terabytesmediahacked[329]
Sony PlayStation Network2011 77,000,000gaminghacked[330]
South Africa police2013 16,000governmenthacked[331]
South Carolina Government2012 6,400,000healthcareinside job[130][332]
South Shore Hospital, Massachusetts2010 800,000healthcarelost / stolen media[37]
Southern California Medical-Legal Consultants2011 300,000healthcarehacked[37]
Spartanburg Regional Healthcare System2011 400,000healthcarelost / stolen computer[130][333]
Stanford University2008 72,000academiclost / stolen computer[37][334]
Starbucks2008 97,000retaillost / stolen computer[37]
Starwood
including Westin Hotels & Resorts and Sheraton Hotels and Resorts		2015 54 locationshotelhacked[335][336]
State of Texas2011 3,500,000governmentaccidentally published[337]
Steam2011 35,000,000webhacked[338]
StockX2019 6,800,000retailhacked[339]
Stratfor2011 935,000militaryaccidentally published[340]
Supervalu2014 200 storesretailhacked[341]
Sutter Medical Center2011 4,243,434healthcarelost / stolen computer[130][342]
Syrian government (Syria Files)2012 2,434,899governmenthacked[343][344]
Taobao2016 20,000,000retailhacked[345]
Taringa! 2017 28,722,877 web hacked [346]
Target Corporation2013 110,000,000retailhacked[347][348]
TaxSlayer.com2016 8,800webhacked[349][350][351]
TD Ameritrade2007 6,300,000financialhacked[352]
TD Bank2012 260,000financialhacked[353][354]
TerraCom & YourTel2013 170,000telecomsaccidentally published[355][356]
Tesla 2023 75,000 transport inside job [357]
Tetrad2020 120,000,000market analysispoor security[358]
Texas Lottery2007 89,000governmentinside job[37]
Ticketfly (subsidiary of Eventbrite) 2018 26,151,608 ticket distribution hacked [359]
Tic Hosting Solutions (known as Torchbyte)2023 unknownhosting providerhacked[360]
Tianya Club2011 28,000,000webhacked[361]
TikTok 2020 42,000,000 social media poor security [216]
TK / TJ Maxx2007 94,000,000retailhacked[362][363]
T-Mobile, Deutsche Telekom2006 17,000,000telecomslost / stolen media[364][365]
T-Mobile2021 45,000,000telecomhacked[366]
T-Mobile2023 37,000,000telecomhacked[367]
Tokopedia2020 91,000,000online shoppinghacked[368]
Tricare2011 4,901,432military, healthcarelost / stolen computer[37]
Triple-S Salud, Inc.2010 398,000healthcarelost / stolen media[130]
Truecaller2019 299,055,000Telephone directoryunknown[369][370]
Trump Hotels2014 8 locationshotelhacked[371][372]
Tumblr 2013 65,469,298 web hacked [373]
Twitch2015 unknowntechhacked[374]
Twitch2021 unknowntechhacked/misconfiguration[375]
Twitter2013 250,000webhacked[376]
Typeform 2018 unknown tech poor security [77]
Uber2014 50,000techpoor security[377]
Uber 2017 57,000,000 transport hacked [378]
Ubisoft2013 unknowngaminghacked[379]
Ubuntu2013 2,000,000techhacked[380]
UCLA Medical Center, Santa Monica2015 4,500,000healthcarehacked[381]
UK Home Office2008 84,000governmentlost / stolen media[382]
UK Ministry of Defence2008 1,700,000governmentlost / stolen media[383]
UK Revenue & Customs2007 25,000,000governmentlost / stolen media[384]
Under Armour2018 150,000,000Consumer Goodshacked[385]
United Nations2019 unknowninternationalhacked[386]
United Nations2021 unknowninternationalhacked[387]
University of California, Berkeley2009 160,000academichacked[388]
University of California, Berkeley2016 80,000academichacked[389]
University of Maryland, College Park2014 300,000academichacked[390]
University of Central Florida2016 63,000academichacked[391]
University of Miami2008 2,100,000academiclost / stolen computer[37]
University of Utah Hospital & Clinics2008 2,200,000academiclost / stolen media[37]
University of Wisconsin–Milwaukee2011 73,000academichacked[37]
Universiti Teknologi MARA 2019 1,164,540 academic hacked [392]
United States Postal Service2018 60,000,000governmentpoor security[393]
UPS2014 51 locationsretailhacked[394]
U.S. Army2011 50,000militaryaccidentally published[37]
U.S. Army
(classified Iraq War documents)		2010 392,000governmentinside job[395]
U.S. Department of Defense2009 72,000militarylost / stolen media[37]
U.S. Department of Veteran Affairs2006 26,500,000government, militarylost / stolen computer[396]
U.S. federal government (2020 United States federal government data breach)2020 TBCgovernment, militaryhacked[397][398][399][400]
U.S. law enforcement (70 different agencies)2011 123,461governmentaccidentally published[401]
National Archives and Records Administration (U.S. military veterans records)2009 76,000,000militarylost / stolen media[402]
U.S. government (United States diplomatic cables leak)2010 260,000militaryinside job[403]
National Guard of the United States2009 131,000militarylost / stolen computer[37]
Vastaamo2020 130,000healthcarehacked[404]
Verifications.io (first leak) 2019 809,000,000 online marketing poor security [405]
Verifications.io (total leaks) 2019 2,000,000,000 online marketing poor security [406]
Verizon Communications2016 1,500,000telecomshacked[407]
View Media 2020 38,000,000 online marketing publicly accessible Amazon Web Services (AWS) server [408]
Virgin Media2020 900,000mobile carrieraccidentally exposed[409][410]
Virginia Department of Health2009 8,257,378government, healthcarehacked[37]
Virginia Prescription Monitoring Program2009 531,400healthcarehacked[37]
Vodafone2013 2,000,000telecomsinside job[411]
VTech2015 5,000,000retailhacked[412]
Walmart2015 1,300,000retailhacked[101]
Washington Post2011 1,270,000mediahacked[413]
Washington State court system2013 160,000governmenthacked[414][415]
Wattpad2020 270,000,000webhacked[416]
Wawa (company)2020 30,000,000retailhacked[417]
Weebly2016 43,430,316webhacked[418][419]
Wendy's2015 unknownrestauranthacked[420][421]
Westpac2019 98,000financialhacked[422]
Woodruff Arts Center2019 unknownarts grouppoor security[423]
WordPress2018 web servicehacked[424]
Writerspace.com2011 62,000webhacked[425]
Xat.com 2015 6,054,459 web social engineering [426]
Yahoo2013 3,000,000,000webhacked[427][428]
Yahoo2014 500,000,000webhacked[429][430][431][432][433]
Yahoo Japan2013 22,000,000tech, webhacked[434]
Yahoo! Voices2012 450,000webhacked[435][436]
Yale University2010 43,000academicaccidentally published[37]
YouTube 2020 4,000,000 social media poor security [216]
Zappos2012 24,000,000webhacked[437]
Zynga2019 173,000,000social networkhacked[438][439]
Unknown agency
(believed to be tied to United States Census Bureau)		2020 200,000,000financialaccidentally published[440]
National Health Information Center (NCZI) of Slovakia 2020 391,250 healthcare poor security [441]
50 companies and government institutions 2022 6,400,000 various poor security [442] [443]
IKEA 2022 95,000 retail accidentally published [444]
Consumer Financial Protection Bureau 2023 256,000 bureau poor security [445]
Directorate General of Immigration of Indonesia 2023 34,900,867 Government hacked and published [446]
Directorate General of Population and Civil Registration (Dukcapil) 2023 337.225.463 Government leaked and published [447]

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