Mengel, Metzger, Barr & Co., LLP (MMB+CO) Data Breach – Investigated by Federman & Sherwood
Oklahoma City, Oklahoma (June 27, 2025) – Federman & Sherwood, a law firm focused on data breach and consumer protection litigation, announces it is investigating a data security incident involving Mengel, Metzger, Barr & Co., LLP (MMB+CO), an accounting services firm based in New York.
According to a notice filed with the Maine Attorney General’s Office on June 26, 2025, MMB+CO experienced a cyberattack on February 21, 2025, which impacted its internal systems. With assistance from third-party cybersecurity experts, MMB+CO initiated a forensic investigation and took immediate steps to secure its network. The investigation later determined, on or about May 19, 2025, that the incident involved unauthorized access to personal information.
The exposed data may include names and other personally identifiable information (PII), including sensitive elements such as Social Security numbers, financial information, or other client-specific data. While there is no current evidence of misuse, out of an abundance of caution, MMB+CO began notifying potentially affected individuals and is offering 12 to 24 months of complimentary credit monitoring and identity protection services through Experian.
Federman & Sherwood is currently investigating the scope of the incident and evaluating whether MMB+CO employed reasonable data protection practices in line with industry standards and federal and state privacy regulations.
The type of information potentially exposed includes:
- Name
- Social Security number
- Financial account information
- Other sensitive information
What is Mengel, Metzger, Barr & Co., LLP (MMB+CO)?
Mengel, Metzger, Barr & Co., LLP (MMB+CO) is a business advisory and accounting firm that provides a wide range of services including tax, assurance, audit, consulting, dispute resolution, business valuation, and forensic and investigative accounting. They also offer support for litigation. The firm, formerly known as Mengel Metzger Barr & Co., merged with Marvin and Company, P.C. to form MMB+CO.
Individuals who have received a notification or believe they may have been affected are encouraged to contact Federman & Sherwood to discuss their legal rights and options.
To learn more about this investigation, please contact:
FEDERMAN & SHERWOOD
Phone: (405) 235-1560
Email : info@federmanlaw.com
Website: www.federmanlaw.com