Wolf Haldenstein Data Breach Exposed 3.5 Million Americans

Wolf Haldenstein Adler Freeman & Herz LLP, a prominent U.S. law firm, has disclosed a data breach affecting nearly 3.45 million individuals. The breach, caused by an external hacking incident, compromised sensitive personal and medical information.

The firm first detected suspicious network activity on December 13, 2023, and took immediate steps to secure its systems. A cybersecurity firm was engaged to investigate the intrusion, confirming that an unauthorized actor had accessed files stored on the firm’s network. However, Wolf Haldenstein did not determine the full extent of the breach until April 18, 2024.

Over the following months, the firm conducted an extensive review of its data to identify affected individuals. By December 3, 2024, it had pinpointed a subset of impacted persons but lacked sufficient address details to notify them directly. Consequently, Wolf Haldenstein issued a public notice on January 10, 2025, advising individuals of the breach and providing resources for identity protection.

While the firm stated that it has no evidence of misuse, the exposed data includes:

• Full names
• Social Security numbers
• Employee identification numbers
• Medical diagnoses
• Medical claim details

Such information is highly sensitive and could be exploited for identity theft, insurance fraud, or unauthorized access to financial accounts.

Wolf Haldenstein is a New York-based law firm with offices in San Diego, Chicago, and Nashville. The firm specializes in securities litigation, class action lawsuits, and antitrust cases. Given its role in handling high-profile legal matters, the breach raises concerns about the security of confidential client information.

Wolf Haldenstein has provided 12 months of complimentary credit monitoring and identity protection services to those who may have been affected. Additionally, it states that it reviewed and strengthened its cybersecurity policies to prevent future incidents.

If you believe you're among the 3.45 million individuals impacted by this incident, you're encouraged to take the following steps:

• Monitor financial statements and credit reports for any suspicious activity.
• Place a fraud alert on their credit file with major credit bureaus (Equifax, Experian, TransUnion).
• Consider a credit freeze, which prevents new accounts from being opened in their name.
• Report any suspected identity theft to the Federal Trade Commission (FTC) at identitytheft.gov.

For additional information or to enroll in credit monitoring, affected individuals can contact Wolf Haldenstein’s assistance line at (800)-650-5752, Monday through Friday, from 9 a.m. to 5 p.m. ET.