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Herman & Chamow, CPAs data breach investigation

Herman & Chamow, CPAs recently reported a data security incident that occurred in November 2025, potentially exposing clients' personal information. The Indiana-based accounting firm provided notification in June 2026, and an investigation is currently underway to understand the full scope and impact on affected individuals.

Filed
June 3, 2026
Regulator
IN AG
People affected
Not stated
File status
Investigation Open

What the filing confirms

  • Herman & Chamow, CPAs reported the incident to the IN Attorney General.

Still unknown

  • Which categories of personal information were taken. The filing does not list them.
  • How many people were affected. The filing does not give a number.
  • What caused the incident beyond the description in the filing.
  • How the attackers got in, and whether basic safeguards such as multi-factor sign-in were in place.
Read the filing at the source

Investigation notes

Herman & Chamow, CPAs, an accounting firm based in Indiana, recently filed notice of a data security incident with state authorities. This report, submitted on June 3, 2026, indicates that an unauthorized event impacted their systems on or about November 3, 2025. While the specific nature of the incident and the exact types of personal information involved remain unspecified in the public record, the firm has begun notifying individuals whose data may have been affected.

The timeline between the breach date in November 2025 and the notification in June 2026 raises questions about the detection and containment of the incident. Often, the length of time attackers have access to systems, known as "dwell time," is a key focus of investigations. Understanding how and when the incident was discovered, and why it took several months to issue public notification, is crucial for assessing the firm’s data security practices.

When personal information is compromised, individuals face an increased risk of various forms of identity theft or fraud. Even without details on the specific data categories involved, any unauthorized access to your private information could lead to significant personal and financial disruption. It is essential for affected individuals to remain vigilant and take protective measures.

If you received a data breach notification letter from Herman & Chamow, CPAs, carefully review its contents for any specific instructions. Consider monitoring your financial accounts and credit reports for suspicious activity. Many experts recommend placing a fraud alert or credit freeze to prevent unauthorized access to your identity or credit.

This incident represents an open investigation into the measures Herman & Chamow, CPAs had in place to protect sensitive client data. Our focus is on examining the company's data security safeguards, the speed of their response, and whether their actions meet industry standards and legal obligations. Affected individuals may have legal options to consider if their personal information was inadequately protected.

We are offering free case reviews to help Indiana residents understand their rights and potential next steps following this data breach. Our team can help assess the details of your situation and determine if the circumstances warrant further legal inquiry. There is no cost or obligation to speak with us about your experience.

What our attorneys examine

A cyberattack does not excuse a company from protecting the information it holds. We look at whether Herman & Chamow, CPAs used reasonable security, how long it kept the data, and how quickly it told the people affected. Those questions decide whether a class action or individual claim is possible. Read more on how ransomware lawsuits work, or browse other incident files in IN.

Herman & Chamow, CPAs data breach questions

Is the Herman & Chamow, CPAs data breach letter legit or a scam?
A notice from Herman & Chamow, CPAs in the mail matches the breach Herman & Chamow, CPAs reported to the IN Attorney General on June 3, 2026. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact Herman & Chamow, CPAs through a phone number or website you find yourself.
Did Herman & Chamow, CPAs offer free credit monitoring?
Check your letter from Herman & Chamow, CPAs. If free credit or identity monitoring is offered, the enrollment code and deadline are printed in the notice itself. Using the free service won't stop you from joining a lawsuit or settlement later.
Is there a Herman & Chamow, CPAs data breach class action lawsuit?
Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against Herman & Chamow, CPAs. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
What should I do after getting the Herman & Chamow, CPAs data breach notice?
Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
Where can I see the official Herman & Chamow, CPAs breach notice?
Herman & Chamow, CPAs's report is published by the IN Attorney General: https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/security-breaches/#herman-chamow-cpas-2026 Compare it with the letter you received to confirm the dates and details match.
Do I need a Herman & Chamow, CPAs data breach lawyer or attorney?
An attorney can read your notice and tell you whether a claim makes sense. A case review here is free, and data breach cases are usually handled on contingency, so there is no upfront cost.
Can I sue Herman & Chamow, CPAs over the data breach?
It depends on what was exposed, the law in IN and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
How much could a Herman & Chamow, CPAs data breach settlement or claim be worth?
There is no set amount, and no Herman & Chamow, CPAs settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. Keep receipts and records; they're what damages claims are built on.

Other open files in IN

Attorney advertising. An incident file reflects a public regulator filing and our review of it; it does not mean a lawsuit has been filed or that the company did anything unlawful. Submitting a review request does not create an attorney-client relationship.