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Japan's Digital Agency Reports Data Breach Affecting 246,000 Records

Japan's Digital Agency Reports Data Breach Affecting 246,000 Records

First seen 11 Sep 2026, 19:43 UTC

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ThreatCluster AI
ThreatCluster September 11, 2026 at 22:47 UTC
  • 246,000 personal data records potentially compromised in Japan's government network breach.
  • Unauthorized access exploited a vulnerability in a VPN device, detected on June 25.
  • No confirmed misuse of the compromised data has been reported so far.

Japan's Digital Agency announced that 246,000 personal data records may have been compromised due to unauthorized access to its Government Solution Service (GSS) network. The breach was detected on June 25, 2026, through an account of a system maintenance administrator, with investigations revealing repeated unauthorized access since late May. The exposed data includes names, email addresses, and phone numbers of government employees and contractors, but does not involve the general public's personal information. Authorities have disabled the affected account and are continuing to investigate the incident. As of now, no misuse of the compromised data has been reported.

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Timeline

2026-06-25
Unauthorized access detected
Japan's Digital Agency identified suspicious access from a maintenance account on this date.
Aa.Tr
2026-07-09
Investigation completed
The agency confirmed unauthorized access had occurred repeatedly since late May.
www.nippon.com
2026-09-11
Public announcement of breach
Japan's Digital Agency publicly disclosed the potential compromise of 246,000 records.
Databreaches

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