Data Breach Index (A–Z) – O
Explore 50 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 Data BreachOglethorpe, Inc. 2025 Data BreachOGUsers (2019 breach)OGUsers (2020 breach)OGUsers (2021 breach)OGUsers (2022 breach)Ohio Living 2026 Data BreachOklahoma Tax Commission Data BreachOMGPOP Data BreachOmnicuris Data BreachOne Medical Seniors Data BreachOneClass (2020) Data BreachOnline Trade (Онлайн Трейд) Data BreachOnliner Spambot Spam Data ListOnRPG Data BreachOnTrac 2026 Data BreachOnverse Data BreachOpen Arms Care 2025 Data BreachOpen CS:GO Data BreachOpen Subtitles Data BreachOpenAI TanStack 2026 Data BreachOpenLoop Health 2026 Data BreachOperation Endgame 2.0 2025 Data BreachOperation Endgame 3.0 Malware ExposureOperation Endgame 4.0 Malware ExposureOperation Endgame Malware ExposureOperation PAR 2025 Data BreachOptalis Management Solutions 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 BreachOrthopaedic Specialists of Massachusetts 2026 Data BreachOS-PvP.net Alleged Data ExposureOSC Connecticut 2025 Data BreachOshoWorld Alleged Data ExposureOSI Systems Data BreachOtelier Data BreachOulfa.fr Alleged Data ExposureOurSports Central Alleged Data ExposureOutcomes One Data BreachOVH Data BreachOwnagePranks Alleged Data ExposureOwnedCore Data BreachOxfam Data Breach