Illinois Data Breaches

The Lake County Health Department and Community Health Center reported a data breach in 2026 affecting 981 patients due to a billing statement printing error.

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SunCloud Health, a behavioral health treatment provider, experienced a data breach between April and May 2026, affecting approximately 2,594 individuals in the United States. The breach compromised patient names and medical information.

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Gila Health Resources experienced a data breach in 2026, stemming from a third-party vendor incident that involved the exposure of Social Security numbers. The full scope of affected individuals remains unclear beyond state-specific reports.

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Maximus, a government services company, experienced a data breach in 2026 affecting sensitive personal information.

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Bretford Manufacturing, Inc. data breach information was reported in 2026 after a ransomware listing identified the company as an Aurora victim. Available reporting identifies Social Security numbers among the exposed information, but the affected individual count has not been disclosed.

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Meridian Health Plan of Illinois experienced a data breach in 2026, impacting over 21,000 individuals.

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Carle Health experienced a data breach in 2026 due to an incident at its third-party vendor, XSolis, potentially involving sensitive patient information.

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Envision Unlimited, a Chicago-based nonprofit, had an unconfirmed data breach reported in July 2026 by the Money Message ransomware group. The nonprofit has not yet confirmed the incident or any data compromise.

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Nissan North America experienced a data breach in June 2026 involving unauthorized access to its Oracle PeopleSoft software, potentially exposing employee information. The full scope of the breach and the exact number of affected individuals are still under investigation.

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Optimum First Mortgage experienced a reported data breach in June 2026, with a ransomware group claiming responsibility. The full extent of data exposure and affected individuals remains unconfirmed by the company.

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Southern Illinois Ob-Gyn Associates reported a data breach in May 2026, which was a hacking/IT incident affecting 38,700 individuals.

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TorHoerman Law, LLC experienced a data breach, though specific details about the incident remain unclear as of 2026. A class action lawsuit has been filed against the firm.

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Deaconess Health System experienced a vendor data breach in January 2026, where sensitive patient data was exposed. A separate ransomware attack by the worldleaks group also targeted Deaconess Health System in April 2026.

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