Strauss Borrelli PLLC, a leading data breach law firm, is investigating Eisner Advisory Group, LLC, a part of the EisnerAmper brand, regarding its recent data breach. The Eisner Advisory Group data breach involved sensitive personal information and protected health information belonging to over 84,000 individuals.
ABOUT EISNER ADVISORY GROUP, LLC:
Eisner Advisory Group is a part of EisnerAmper, a global business consulting firm comprised of EisnerAmper LLP, a licensed independent CPA firm that provides client attest services; and Eisner Advisory Group LLC.3 Today, Eisner Advisory Group is an alternative practice structure that provides business advisory and non-attest services to businesses across a wide range of industries.3 Headquartered in New York, New York, combined these entities include more than 450 partners and 4,500 employees.3
WHAT HAPPENED?
Recently, Eisner Advisory Group reported to the Attorney General of Maine that the sensitive personal identifiable information in its care may have been accessed and acquired. According to the breach notice, on September 9, 2023, Eisner Advisory Group became aware of suspicious activity with respect to a limited set of information.1 As a result, Eisner Advisory Group launched an investigation to determine the nature of the incident.
Through its investigation, Eisner Advisory Group confirmed that sensitive personal information in its systems may have been viewed and obtained by an unauthorized third party between September 4 and September 9, 2023. As a result, Eisner Advisory Group began a review of the data to determine what information had been impacted as well as identify the specific individuals affected. On February 13, 2025, Eisner Advisory Group completed this review. While the information impacted varies depending on the individual, the type of information potentially exposed includes:
- Name
- Social Security number
- Address
- Date of birth
- Driver’s license or state identification number
- Passport number
- Financial account number
- Payment card information
- Medical information
- Health insurance information
On April 8, 2025, Eisner Advisory Group began mailing data breach notification letters to impacted individuals. Based on the breach notice sent to Maine residents, Eisner Advisory Group is providing affected individuals with a list of the specific types of sensitive information impacted and complimentary credit monitoring services. A link to the form breach notification letters that Eisner Advisory Group filed with the Attorney General of Maine is below.
If you received a breach notification letter from Eisner Advisory Group, LLC:
We would like to speak with you about your rights and potential legal remedies in response to this data breach. Please fill out the form, below, or contact us at 872.263.1100 or sam@straussborrelli.com.
