Data Breach Index (A–Z) – O
Explore 66 data breaches in the O group. Open a record for exposed data classes, affected account counts and recommended security steps.
O
Oak Hill 2025 Data BreachOak View Group 2025 Data BreachOASIS Games Alleged Data ExposureOdido 2026 Data BreachOfix Data BreachOglethorpe, Inc. 2025 Data BreachOGUsers (2019 Data Breach)OGUsers (2020 Data Breach)OGUsers (2021 Data Breach)OGUsers (2022 Data Breach)Ohio Living 2026 Data BreachOklahoma Tax Commission Data BreachOkta Data BreachOmaze Alleged Data ExposureOMGPOP Data BreachOmni Hotels Data BreachOmnicuris Data BreachOndokuz May University Data BreachOne Medical Seniors Data BreachOneBlood Data BreachOneClass (2020) Data BreachOngab Data BreachOnline Trade (Онлайн Трейд) Data BreachOnlineBloodBank Alleged Data ExposureOnliner Spambot Spam Data ListOnlineSkills Alleged Data ExposureOnRPG Data BreachOnTrac 2026 Data BreachOnur360 (Özen International) Data BreachOnverse Data BreachOpen Arms Care 2025 Data BreachOpen CS:GO Data BreachOpen Subtitles Data BreachOpenAI TanStack 2026 Data BreachOpenLoop Health 2026 Data BreachOpenRaid Data BreachOperation Endgame 2.0 2025 Data BreachOperation Endgame 3.0 2025 Malware ExposureOperation Endgame 4.0 2026 Malware ExposureOperation Endgame Malware ExposureOperation PAR 2025 Data BreachOptalis Management Solutions Data BreachOptus Data BreachOracle Health/Cerner Data Breach (At Least 2.65 Million)Orange Data BreachOrange Romania Data BreachOrderSnapp Data BreachOrdine Avvocati di Roma Data BreachOrigin Energy 2026 Data BreachOrtadoğu Holding System Encryption & Data BreachOrthopaedic Specialists of Massachusetts 2026 Data BreachOS-PvP.net 2021 Data BreachOSC Connecticut 2025 Data BreachOshoWorld Alleged Data ExposureOSI Systems Data BreachOtelier Data BreachOulfa.fr Alleged Data ExposureOurSports Central Alleged Data ExposureOutcomes One Data BreachOverblog Alleged Data ExposureOVH Data BreachOwnagePranks Alleged Data ExposureOwnedCore Data BreachOxfam Data BreachOz Hair and Beauty Data BreachUniversity of Oxford CareerConnect 2026 Data Breach