McElroy, Deutsch, Mulvaney & Carpenter Data Breach Lawsuit Investigation
A recent cyber-attack on McElroy, Deutsch, Mulvaney & Carpenter has put client and employee data at risk. If you received a breach notification dated December 19, 2025, you may be entitled to free identity-protection services and potential monetary remedies. Use the resources below to understand the incident and evaluate your legal options.
Key Timeline
- Cyber-attack window: March 28 – April 1, 2025
- Intrusion discovered: April 3, 2025
- Forensic review completed: December 4, 2025
- Consumer notices mailed: December 19, 2025
- Incident reported to Maine AG: December 19, 2025
What Happened
According to the firm’s submission to the Maine Attorney General, McElroy, Deutsch, Mulvaney & Carpenter (McElroy, Deutsch, Mulvaney & Carpenter LLP) confirmed that unauthorized actors gained access to its network between March 28 and April 1, 2025. A comprehensive investigation identified files containing personal data that were accessed or exfiltrated during the breach.
Information Involved
The impacted files included names and additional unspecified personal data elements. The firm’s notice did not list every data field but advised recipients to treat their information as potentially compromised.
Firm’s Response
- Secured the network and engaged cybersecurity specialists.
- Notified federal law-enforcement and relevant regulators.
- Reviewed internal policies and procedures to help prevent future incidents.
- Offered complimentary credit-monitoring and identity-protection services through Epiq.
Your Next Steps
- Download and review the official breach notice for detailed instructions.
- Activate the complimentary Epiq credit-monitoring services as soon as possible.
- Monitor bank, card, and insurance statements for unfamiliar transactions.
- Obtain free credit reports and place fraud alerts if suspicious activity appears.
- Consult an experienced data-privacy attorney to explore compensation options.
Company Overview
Founded in 1983, McElroy, Deutsch, Mulvaney & Carpenter is a full-service law firm headquartered at 1300 Mount Kemble Avenue, Morristown, NJ, United States.
- Industry: Legal Services
- Headquarters: Morristown, New Jersey, United States
- Employees: 199
- Website: mdmc-law.com
- LinkedIn: @mcelroy-deutsch-mulvaney-&-carpenter-llp
- Facebook: facebook.com/MDMC.Law
- X (Twitter): @MDMC_LAW
Frequently Asked Questions
I received a data breach letter from McElroy, Deutsch, Mulvaney & Carpenter — what should I do?
Enroll in the complimentary credit-monitoring services, keep a copy of the letter, and watch your financial accounts and credit reports for unauthorized activity.
How do I submit a claim related to the McElroy, Deutsch, Mulvaney & Carpenter data breach?
First confirm your inclusion in the breach, gather documentation (notice letter, evidence of fraud or time spent), and speak with a qualified privacy attorney to evaluate potential claims.
Am I eligible to join a lawsuit against McElroy, Deutsch, Mulvaney & Carpenter?
If your personal information was accessed between March 28 and April 1, 2025, you may qualify. Eligibility depends on the breach scope and applicable state laws.
What information did the McElroy, Deutsch, Mulvaney & Carpenter breach expose?
Names plus additional personal data elements contained in affected files were at risk.
Did McElroy, Deutsch, Mulvaney & Carpenter offer credit monitoring?
Yes. The firm is covering the cost of a complimentary credit-monitoring package through Epiq.
How can I get the official breach notice (PDF) for McElroy, Deutsch, Mulvaney & Carpenter?
Click the dark-blue “Download Official Breach Notice (PDF)” button above or visit the Maine Attorney General’s website.
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