Blair C Diaz CPA PC Reports 2026 Data Breach in Indiana

Blair C Diaz CPA PC, an Indiana-based accounting firm, filed a data breach report on September 28, 2026, disclosing a security incident from July 2, 2026. The breach involved highly sensitive client information, including Full Name, Social Security Number, and Financial Account Number. Affected individuals face elevated risks of identity theft and financial fraud due to the exposed data.

State: Indiana
Breach date: July 2, 2026
Reported: September 28, 2026

What may have been exposed

Full Name
Social Security Number
Date of Birth
Tax Return Information
Wage and Compensation Information
Financial Account Number
Routing Number
Mailing Address

On September 28, 2026, Blair C Diaz CPA PC formally reported a data security incident to the Indiana Attorney General, indicating that a breach occurred on July 2, 2026. As an accounting and financial services firm, Blair C Diaz CPA PC routinely handles a substantial volume of confidential client data necessary for tax preparation and financial management.

The compromised information includes Full Name, Social Security Number, Date of Birth, Tax Return Information, Wage and Compensation Information, Financial Account Number, Routing Number, and Mailing Address. The exposure of these specific data categories creates a significant risk for affected individuals, potentially leading to fraudulent tax filings, unauthorized account access, and identity theft.

While details of the breach are still under investigation, incidents affecting accounting firms often stem from sophisticated external network intrusions or vulnerabilities in third-party applications. Threat actors frequently target such firms to gain access to comprehensive client financial records.

Individuals who receive a breach notification from Blair C Diaz CPA PC should take proactive steps to safeguard their identity and finances. It is recommended to carefully review all financial statements and credit reports for any suspicious activity. Placing a fraud alert or security freeze on credit files can help prevent unauthorized accounts from being opened.

Monitoring tax filings and communications from the IRS is also crucial, as compromised tax information can be used for fraudulent tax returns. Affected individuals should also consider changing passwords for financial accounts and other sensitive online services, using strong, unique combinations.

What to do if you were affected

Based on the categories of information reported in this filing, these steps can help limit the risk of identity theft and fraud.

Freeze your credit
Place a free credit freeze with Equifax, Experian, and TransUnion. A freeze blocks new accounts from being opened in your name and can be lifted anytime.
Guard against tax fraud
File your tax return as early as possible and consider requesting an IRS Identity Protection PIN so no one can file a fraudulent return in your name.
Watch your financial accounts
Review bank and card statements for unfamiliar activity and turn on transaction alerts. Report anything you don't recognize to your bank right away.
Stay alert to targeted scams
Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.
Keep your notification letter
Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.

Source: Indiana Attorney General filing

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