Insurance giant Aflac discloses data breach at Japan subsidiary

Databreaches •Dissent • June 30, 2026

Sergiu Gatlan reports: American insurance giant Aflac has disclosed a new data breach after attackers breached its Japan subsidiary’s systems and stole personal and bank account information. Aflac (short for American Family Life Assurance Company) is a Fortune 500 company and the largest supplemental insurance provider in the United States, serving millions of customers in... Source

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Aflac Japan Data Breach Affects 4.38 Million Customers Aflac Japan disclosed a data breach affecting 4.38 million customers after unauthorized access to its systems between June 15 and June 25, 2026. The breach was detected on June 25, prompting the suspension of certain systems while continuing to serve policyholders. The attackers accessed sensitive personal and financial information, including policy details and bank account data. Aflac has engaged external cybersecurity experts for investigation and notified relevant authorities, confirming that U.S. systems were not compromised. The full scope of the breach and its potential impact remain under investigation. This incident follows a previous breach in 2023 attributed to the same threat group, Scattered Spider. 18 sources 69

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Insurance giant Aflac discloses data breach at Japan subsidiary

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