City of Sheboygan issue update on data security incident from last year

SHEBOYGAN, Wis. (WBAY) - The City of Sheboygan posted an update on its website regarding a “data incident” from last year. The city acknowledged some people’s data was affected.

On October 31, 2024, the city said it experienced an “encryption event” that resulted in a network disruption.

Previous reports said the city was hit with a ransomware attack. At the time, the city government said it discovered there was unauthorized access to the city’s network by an external party. Since then, the city says it has secured its network.

The city said it worked with experts to do a thorough forensic review to understand the full scope of this attack.

In an update posted on the city’s website on May 28, a statement said after a review of the data involved, the city learned on May 14, 2025, that certain individuals’ personal information was affected by this incident.

On May 23, 2025, the city mailed notices to affected individuals.

The city did not release any other information. For more information or further questions, people are encouraged to contact City Administration at 920-459-3287 or marie.foss@sheboyganwi.gov.