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MonitoringMontana AG filing · December 19, 2025

Aflac Incorporated Reports 2025 Data Breach in Montana

Aflac Incorporated filed notice of a data security incident with the Montana Attorney General, affecting personal information of individuals. The breach, which occurred on June 12, 2025, exposed sensitive data such as Social Security Numbers, financial account details, and claims information. This incident underscores the ongoing risks of identity theft and financial fraud for those impacted.

State
Montana
Breach date
June 12, 2025
Reported
December 19, 2025

What may have been exposed

  • Full Name
  • Social Security Number
  • Date of Birth
  • Policy Number
  • Financial Account Number
  • Routing Number
  • Claims and Medical Information
  • Address and Contact Information

Aflac Incorporated, a prominent provider of supplemental insurance, officially reported a data security incident to the Montana Attorney General on December 19, 2025. The company stated that this breach took place on June 12, 2025, and its investigation into the matter is currently ongoing. This event highlights the persistent vulnerabilities faced by large institutions that manage extensive consumer data.

The information identified as compromised in the filing includes a wide range of personal identifiers. Specifically, the exposed data categories are: Full Name, Social Security Number, Date of Birth, Policy Number, Financial Account Number, Routing Number, Claims and Medical Information, and Address and Contact Information.

The exposure of such detailed personal and financial data carries significant implications for affected individuals. With sensitive information like Social Security Numbers and financial account details exposed, there is an elevated risk of identity theft, various forms of fraud, and unauthorized access to existing accounts. The inclusion of Claims and Medical Information could also lead to medical identity theft.

Individuals who receive official notification regarding this breach should take proactive steps to protect their information. It is strongly recommended to monitor financial statements and credit reports for any unusual or unauthorized activity. Placing a fraud alert or a credit freeze with the major credit bureaus can add a layer of protection, and vigilance against phishing emails or suspicious communications is advised.

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.

  • 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.

  • Check for medical identity theft

    Review the Explanation of Benefits statements from your health insurer for services or claims you never received, which can signal misuse of your medical identity.

  • 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: Montana Attorney General filing

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