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Wisconsin Data Breaches
Browse data breaches affecting Wisconsin residents in 2026. Stay informed about security incidents and protect your personal information.
Showing 25 breaches affecting Wisconsin
Midwest Spine and Brain Institute
Discovered Aug 19, 2026
The Midwest Spine and Brain Institute data breach, reported in 2026, involved unauthorized access through third-party vendor 3C Care Systems LLC. Social Security numbers, names, and medical records were exposed, but the affected count has not been disclosed; the available sources identify Minnesota, Wisconsin, and Massachusetts reporting or operating connections.
You may be entitled to compensation
3c Care Systems
Discovered Aug 19, 2026
The 3C Care Systems data breach, reported in 2026, involved unauthorized access to systems managed for Midwest Spine and Brain Institute. Reports identified exposed Social Security numbers and medical information, but the number of affected individuals remains undisclosed.
You may be entitled to compensation
Atrium Centers
Discovered Aug 18, 2026
Atrium Centers experienced a data breach in late 2025 where unauthorized access to its IT systems resulted in the potential exposure of sensitive personal and medical information. Litigation against the company is ongoing.
You may be entitled to compensation
NAVIENT CORP
Discovered Jul 2, 2026
Navient Corp experienced a third-party data breach in June 2026, where unauthorized access to a law firm's systems exposed the personal data of approximately 2.5 million student loan borrowers.
Nissan North America
Discovered Jun 27, 2026
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.
You may be entitled to compensation
KerberRose
Discovered Jun 1, 2026
KerberRose experienced a data breach in May 2026, impacting over 27,000 individuals.
You may be entitled to compensation
AT&T
Discovered May 30, 2026
The purported 2026 data breach at "Lee Law Offices" is a misidentification. The research indicates a major AT&T data breach affecting over 100 million individuals in 2024, which frequently causes confusion in data security discussions.
WEAC
Discovered May 12, 2026
The Wisconsin Education Association Council (WEAC) reported a data incident in 2026, with limited details publicly available.
You may be entitled to compensation
Wisconsin Education Association Council
Discovered May 11, 2026
The Wisconsin Education Association Council experienced a data breach in late 2025 that was reported in May 2026. The incident involved an external system breach via hacking.
Mile Bluff Medical Center
Discovered Apr 22, 2026
Mile Bluff Medical Center reported a data incident involving file encryption across parts of its network, as disclosed by a public filing in April 2026. The extent of patient data compromise remains unclear.
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Discovered Mar 17, 2026
Stevent Bail Bonds experienced a data breach in late 2025, which was publicly disclosed in early 2026, impacting over a million individuals.
You may be entitled to compensation
Eyemart Express
Discovered Mar 10, 2026
Eyemart Express experienced a ransomware data breach in March 2026, impacting individuals across 42 states.
You may be entitled to compensation
Bell Ambulance, Inc.
Discovered Mar 9, 2026
Bell Ambulance, Inc. experienced a data breach in late 2025 that was reported in March 2026, impacting over 230,000 individuals nationally.
You may be entitled to compensation
North Central HIDTA
Discovered Mar 6, 2026
North Central HIDTA, a federal government program, was claimed as a ransomware victim by the Dragonforce group on March 6, 2026, though details remain unconfirmed.
Ace Ethanol
Discovered Feb 27, 2026
Ace Ethanol experienced a data breach in February 2026, reportedly due to a ransomware attack by the Akira group.
CarGurus, Inc.
Discovered Feb 24, 2026
CarGurus, Inc. experienced a data breach in February 2026, reportedly compromising the data of millions of user accounts and corporate records.
Avis Rent A Car System LLC
Discovered Jan 15, 2026
Avis Rent A Car System LLC experienced a data breach in early 2026, potentially affecting approximately 500,000 individuals.
You may be entitled to compensation
Nissan Investigates 910GBand Extortion
Discovered Jan 15, 2026
Nissan North America investigated a data breach in 2026 after a ransomware group claimed to have exfiltrated 910GB of data, leading to the exposure of personal and sensitive information for over 220,000 individuals in the US.
You may be entitled to compensation
Hightower Holding, LLC
Discovered Jan 8, 2026
Hightower Holding, LLC experienced a data breach in January 2026 affecting approximately 131,483 individuals.
You may be entitled to compensation
Panera, LLC
Discovered Jan 5, 2026
Panera, LLC experienced a data breach in January 2026, which exposed personal information of approximately 5.1 million customers nationwide.
You may be entitled to compensation
Chrysler
Discovered Dec 26, 2025
Chrysler experienced a data breach in late 2025, with the Everest ransomware group claiming to have stolen over 1TB of data affecting customers nationwide.
Aesto, LLC
Discovered Dec 2, 2025
Aesto, LLC experienced a data breach in December 2025, potentially exposing patient data from its covered-entity clients.
You may be entitled to compensation
Delta Dental of Virginia
Discovered Dec 1, 2025
Delta Dental of Virginia experienced a data breach in December 2025 that was confirmed in 2026, affecting approximately 146,000 individuals.
You may be entitled to compensation
CoVantage Credit Union
Discovered Aug 14, 2025
CoVantage Credit Union experienced a data breach in 2025 due to a vendor incident, the full impact of which is still being determined.
You may be entitled to compensation
WEL Companies, Inc.
Discovered Jan 30, 2025
WEL Companies, Inc. experienced a data breach in 2025 where personally identifiable employment and regulatory data of 122,960 individuals were reportedly exposed.
You may be entitled to compensation
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