Windels Marx Lane & Mittendorf LLP Confirms Indiana Data Breach

Windels Marx Lane & Mittendorf LLP, a prominent law firm, filed a report with the Indiana Attorney General on March 30, 2026, confirming a data security incident. This event involved unauthorized access to their systems, which was first identified on September 11, 2025.

The firm's operations involve handling sensitive client information. The unauthorized access means that personal information maintained within their systems may have been compromised. While the specific types of data involved are not detailed in the public record, individuals who received a direct notification from the firm should consider that their data was affected.

If you have received an official notification letter from Windels Marx Lane & Mittendorf LLP, it indicates that your personal information was stored within their environment at the time of the incident. This notice is provided to inform you of the event and offer guidance on steps you can take.

Following any data security incident, it is generally recommended to review your financial account statements and credit reports regularly for any unusual or unauthorized activity. Consider placing a fraud alert on your credit file with the major credit bureaus, and be wary of any unsolicited requests for personal information, which could be phishing attempts.

This information is based on public filings made by Windels Marx Lane & Mittendorf LLP with regulatory authorities in Indiana, verifying the occurrence of this data security event.