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Ransomware attacks on education: 991 confirmed incidents, 2018 to 2026

// CONFIRMED RANSOMWARE ATTACKS · SECTOR

Ransomnews has confirmed 991 ransomware attacks on education between January 2018 and August 2026, each one verified against a public source such as a breach notification, regulatory filing, court record or press report. That is 10.4% of the 9,520 confirmed incidents in the dataset. So far in 2026, 48 have been confirmed, against 113 in 2025 and 146 in 2024. The United States accounts for 643 of them (65%), with victims recorded in 53 countries in total. Where the operator is attributed, Lockbit leads with 57 confirmed victims. A ransom payment is on the public record in 33 cases and a refusal in 174; the outcome is unrecorded in the remaining 784.

991Confirmed incidents
482026 year to date
53Countries
16%Paid, where outcome is public
18,311,115Records exposed (278 disclosed cases)

Confirmed ransomware attacks on education by year

The current year is a partial count. Confirmation lags the attack itself, so recent months keep filling in after the fact; read a low figure for the latest year as incomplete rather than as a decline.

Source: ransomnews.com
YearConfirmed attacksRansom paid (public)Ransom refused (public)
20181834
2019106925
2020120525
2021118531
2022125522
2023197532
2024146113
2025113013
2026 (year to date)4809
ransomnews.com1820181062019120202011820211252022197202314620241132025482026
Confirmed ransomware attacks on education per year. Source: Ransomnews Confirmed Ransomware Attacks Dataset.

Which ransomware groups attack education most

The operator is attributed in 563 of the 991 confirmed incidents. Counts are confirmed victims, not leak-site claims, so they run well below the totals the groups publish about themselves. Group names link to the live Ransomtracker profile where one exists.

Most active groups by confirmed victims

  • Lockbit57 10%
  • Vice Society46 8%
  • Pysa30 5%
  • Rhysida30 5%
  • Medusa28 5%
  • INC21 4%
  • Ryuk20 4%
  • Qilin19 3%
  • Interlock18 3%
  • RansomHub17 3%

Where the confirmed attacks on education fall

Country shares carry a reporting bias. United States breach-notification law and SEC disclosure rules push far more incidents onto the public record than most jurisdictions, which makes American attacks easier to confirm and inflates the US share of any confirmed dataset.

Most affected countries

  • United States643 65%
  • United Kingdom85 9%
  • Germany35 4%
  • Canada31 3%
  • Japan25 3%
  • France22 2%
  • Australia18 2%
  • Netherlands10 1%
  • Spain10 1%
  • Italy9 1%

Ransom payment outcomes for education

Among the 207 confirmed education incidents where the outcome is on the public record, 33 paid and 174 refused, a disclosed payment rate of 15.9%. The remaining 784 carry no public statement either way. Victims that pay have every incentive to stay quiet and public bodies are the most likely to announce a refusal, so treat this as the disclosed rate, not the true one. The ransomware payment rate analysis explains how the disclosed rate has moved since 2018 and how it compares with incident-response firm samples.

Largest confirmed ransomware attacks on education by records exposed

Record counts are recorded only where a named source disclosed them, which is the minority of cases, so this table ranks disclosed impact rather than true impact.

Source: ransomnews.com, verified against the linked public source
DateOrganisationSectorLocationRecordsGroupRansom paidSource
August 2025University of PhoenixEducationArizona, United States3,489,274ClopUnknowncyber.nj.gov
September 2024Texas Tech University Health Sciences Center (TTUHSC), University Medical Center in LubbockEducationTexas, United States1,628,892InterlockUnknownabc7amarillo.com
June 2023University of ManchesterEducationManchester, United Kingdom1,100,000—Unknownbleepingcomputer.com
December 2024Chicago Public SchoolsEducationIllinois, United States700,000ClopUnknowngovtech.com
May 2026CKC Network, Inc. and Gakusan Co., Ltd.EducationNagoya, Japan664,000—Unknownckc.co.jp
June 2020Metropolitan Community College of Kansas CityEducationMissouri, United States638,186—Unknownkctv5.com
December 2021Battelle for KidsEducationOhio, United States551,586—Unknownlocal12.com
September 2021Arnhem and Nijmegen University of Applied Sciences (HAN)EducationArnhem, Netherlands530,000—Nocursor.tue.nl
July 2024Pennsylvania State Education AssociationEducationPennsylvania, United States517,487RhysidaUnknownmaine.gov
June 2021Judson Independent School DistrictEducationTexas, United States428,761PysaYestpr.org

Most recent confirmed ransomware attacks on education

The 25 most recently confirmed of 991 incidents, newest first. Every row links to the public source it was verified against.

Source: ransomnews.com, verified against the linked public source
DateOrganisationSectorLocationRecordsGroupRansom paidSource
August 2026Brazosport CollegeEducationTexas, United States—QilinUnknownbrazosport.edu
July 2026Southeastern Oklahoma State UniversityEducationOklahoma, United States—InterlockUnknownkxii.com
July 2026Universitatea de Vest "Vasile Goldiș” din AradEducationArad, Romania—QilinUnknownziare.com
July 2026Townsville Christian CollegeEducationVincent, Australia——Notownsvillebulletin.com.au
July 2026Loyalist CollegeEducationBelleville, Canada—INCUnknownloyalistcollege.com
July 2026Universidade de AveiroEducationAveiro, Portugal——Nopublico.pt
July 2026Cedar Crest CollegeEducationPennsylvania, United States—NightSpireUnknowncedarcrest.edu
July 2026Hachioji Junior & Senior High SchoolEducationTokyo, Japan——Unknownhachioji.ed.jp
July 2026Universidad de AlicanteEducationAlicante, Spain——Noweb.ua.es
June 2026Koyasan UniversityEducationKoya, Japan——Unknownkoyasan-u.ac.jp
June 2026Palatine Primary SchoolEducationWorthing, United Kingdom—StormousUnknownpalatineschool.org
June 2026Mount Royal UniversityEducationCalgary, Canada—CMD OrganizationUnknownemergency.mtroyal.ca
June 2026Musashino UniversityEducationTokyo, Japan—QilinNonewsdig.tbs.co.jp
June 2026Akademia Leona Koźmińskiego - Kozminski UniversityEducationWarsaw, Poland—The GentlemenUnknownkozminski.edu.pl
June 2026Reynella East CollegeEducationReynella East, Australia—InterlockUnknownfacebook.com
June 2026Evanston Township High School District 202EducationIllinois, United States——Unknowneths202.org
May 2026Wyższa Szkoła Biznesu - National Louis UniversityEducationNowy Sącz, Poland—Nova (RALord)Unknowncyberdefence24.pl
May 2026Grey High SchoolEducationGqeberha, South Africa—LockBitUnknowngreyhighschool.com
May 2026Kyushu UniversityEducationFukuoka, Japan43—Unknownkyushu-u.ac.jp
May 2026Australian College of Business IntelligenceEducationSydney, Australia—QilinUnknowncyberdaily.au
May 2026Universitat de ValènciaEducationValència, Spain—Nova (RALord)Noescudodigital.com
May 2026Delano Public SchoolsEducationMinnesota, United States—LockBitNodelanoheraldjournal.com
May 2026Vysoká škola finanční a správní (University of Finance and Administration)EducationPrague, Czechia—The GentlemenUnknownfacebook.com
May 2026CKC Network, Inc. and Gakusan Co., Ltd.EducationNagoya, Japan664,000—Unknownckc.co.jp
April 2026IFAGEEducationGeneva, Switzerland—DragonForceNotdg.ch

Frequently asked questions

How many ransomware attacks on education have been confirmed?

Ransomnews has confirmed 991 ransomware attacks on education since January 2018, including 48 so far in 2026. Each one is verified against a public source such as a breach notification, regulatory filing or press report. The true total is higher, because many victims never disclose; confirmed counts are a floor, not a ceiling.

Which ransomware group attacks education most often?

Lockbit, with 57 confirmed victims, followed by Vice Society (46) and Pysa (30). These are confirmed victims, not leak-site claims, counted among the 563 incidents where the operator is attributed.

Which country has the most confirmed education ransomware attacks?

The United States, with 643 of the 991 confirmed incidents (65%). The United Kingdom is next with 85. Part of the gap is exposure and part is reporting: US breach-notification and SEC disclosure rules put more incidents on the public record than most jurisdictions.

How often do education ransomware victims pay the ransom?

Among the 207 confirmed education incidents with a public outcome, 33 paid and 174 refused, a disclosed payment rate of 15.9%. Most victims never state whether they paid, and those who pay have the least reason to say so, so the disclosed rate understates real payment behaviour. The payment rate analysis tracks this figure since 2018.

What is the largest confirmed education ransomware attack by records exposed?

University of Phoenix (Arizona, United States, August 2025), with 3,489,274 records exposed according to cyber.nj.gov. Record counts exist only where a source disclosed them, so this ranks disclosed impact.

Confirmed ransomware attacks by sector, country and year

Every page below is generated from the same verified dataset. See the full index.

By sector

  • Healthcare 1,627
  • Government 1,469
  • Manufacturing 1,069
  • Education 991
  • Services 647
  • Financial services 633
  • Technology 564
  • Retail 504
  • Food and beverage 348
  • Transportation 274
  • Construction 259
  • Legal 244
  • Utilities 244

By country

  • United States 5,099
  • France 503
  • Germany 410
  • Japan 367
  • Canada 351
  • United Kingdom 319
  • Australia 226
  • Italy 214
  • Brazil 156
  • Spain 143
  • Switzerland 120
  • India 105
  • Netherlands 105
  • Denmark 62
  • Belgium 61
  • South Africa 61
  • All 36 countries

By year

  • 2018 168
  • 2019 459
  • 2020 1,229
  • 2021 1,437
  • 2022 961
  • 2023 1,549
  • 2024 1,550
  • 2025 1,469
  • 2026 698

By month, latest

  • Aug 2025 136
  • Sep 2025 149
  • Oct 2025 118
  • Nov 2025 112
  • Dec 2025 118
  • Jan 2026 98
  • Feb 2026 95
  • Mar 2026 122
  • Apr 2026 101
  • May 2026 82
  • Jun 2026 87
  • Jul 2026 62
  • Aug 2026 51

How to read this page. Every incident counted here was verified by Ransomnews against at least one public source. Leak-site listings alone do not qualify, because operators inflate, duplicate and occasionally fabricate claims, so these totals are a defensible floor rather than a full census. Records exposed and ransom outcomes appear only where a named source disclosed them. The page is regenerated from the live database, which refreshes weekly. Cite as: Ransomnews Confirmed Ransomware Attacks Dataset, ransomnews.com, with a link to this page. Bulk access and methodology questions: [email protected]. See also the monthly ransomware statistics and the Ransomtracker.

// The Ransomnews Monthly

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