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
OASIS Games Alleged Data ExposureOGUsers (2019 breach)OGUsers (2020 breach)OGUsers (2021 breach)OGUsers (2022 breach)OMGPOP Data BreachOS-PvP.net Alleged Data ExposureOSI Systems 2025 Data BreachOVH Data BreachOak Hill 2025 Data BreachOak View Group 2025 Data BreachOdido Data BreachOglethorpe, Inc. 2025 Data BreachOhio Living 2026 Data BreachOklahoma Tax Commission Data BreachOmnicuris Data BreachOnRPG Data BreachOnTrac 2026 Data BreachOne Medical Seniors 2026 Data BreachOneClass (2020) Data BreachOnline Trade (Онлайн Трейд) Data BreachOnliner Spambot Spam Data ListOnverse Data BreachOpen Arms Care 2025 Data BreachOpen CS:GO Data BreachOpen Subtitles Data BreachOpenAI TanStack 2026 Data BreachOpenLoop Health 2026 Data BreachOperation Endgame Malware ExposureOperation Endgame 2.0 2025 Data BreachOperation Endgame 3.0 Malware ExposureOperation Endgame 4.0 Malware ExposureOperation PAR 2025 Data BreachOptalis Management Solutions Data BreachOracle Health/Cerner 2025 Data BreachOrange Alleged Data ExposureOrange Romania Data BreachOrderSnapp Data BreachOrdine Avvocati di Roma Data BreachOrigin Energy 2026 Data BreachOrthopaedic Specialists of Connecticut 2025 Data BreachOrthopaedic Specialists of Massachusetts 2026 Data BreachOshoWorld Alleged Data ExposureOtelier Data BreachOulfa.fr Alleged Data ExposureOurSports Central Alleged Data ExposureOutcomes One 2025 Data BreachOwnagePranks Alleged Data ExposureOwnedCore Data BreachOxfam Data Breach