> Cause not stated in filing
City of Sheboygan, Wisconsin data breach investigation
- Filed
- May 23, 2025
- Regulator
- New Hampshire AG
- People affected
- Not stated
- File status
- Investigation Open
What the filing confirms
- City of Sheboygan, Wisconsin reported the incident to the New Hampshire Attorney General.
Still unknown
- Which categories of personal information were taken. The filing does not list them.
- How many people were affected. The filing does not give a number.
- What caused the incident beyond the description in the filing.
- How the attackers got in, and whether basic safeguards such as multi-factor sign-in were in place.
Investigation notes
The City of Sheboygan, Wisconsin is a municipal government entity responsible for providing public services and managing administrative records for its residents. As a government body, the City typically collects and stores sensitive personal information including tax records, utility account details, payroll data for municipal employees, and vital records. In 2025, the City of Sheboygan officially reported a data security incident to the New Hampshire Attorney General, indicating that unauthorized access to their systems may have occurred. If you have received a formal data breach notification letter from the City, it means your personal information was likely contained within the affected files. This notice is intended to inform you of the incident and provide guidance on the steps you should take to protect your identity.
What our attorneys examine
A cyberattack does not excuse a company from protecting the information it holds. We look at whether City of Sheboygan, Wisconsin used reasonable security, how long it kept the data, and how quickly it told the people affected. Those questions decide whether a class action or individual claim is possible. Read more on how ransomware lawsuits work, or browse other incident files in New Hampshire.
Other open files in New Hampshire
- Janome America, Inc.New Hampshire Attorney General · Filed July 31, 2026Count not stated
- Sullivan Environmental ServicesNew Hampshire Attorney General · Filed July 31, 2026Count not stated
- City of New Britain, Inc.New Hampshire Attorney General · Filed July 30, 2026Count not stated
- New Hampshire Housing Yardi’s RentCafeNew Hampshire Attorney General · Filed July 30, 2026Count not stated
- Pocket FMNew Hampshire Attorney General · Filed July 30, 2026Count not stated
- Werth Wealth Management, LLCNew Hampshire Attorney General · Filed July 29, 2026Count not stated
Attorney advertising. An incident file reflects a public regulator filing and our review of it; it does not mean a lawsuit has been filed or that the company did anything unlawful. Submitting a review request does not create an attorney-client relationship.