Japan's Digital Agency said on September 11 that its Government Solution Service (GSS) was accessed without authorization: on June 25 it detected mass file access using a maintenance account, and on July 9 confirmed a third party had entered through a VPN device vulnerability [1]. About 246,000 personal data records may have leaked, covering staff and civil servants of ministries using GSS and related contractors, including names, emails, phones and addresses, but no general public data, My Number, bank accounts or pension numbers [1]. People who may be affected should beware of emails, calls and texts posing as the Digital Agency or related bodies, and not open unfamiliar links or attachments or enter passwords or card details [1].
Japan Digital Agency's shared government work environment GSS breached via VPN flaw; about 246,000 civil servant records at risk
1 min read
- Disclosed
- Sep 11, 2026
- Occurred
- Jun 25, 2026
- Published
- Nov 11, 2026
- Last updated
- Nov 11, 2026
- Scale
- 246,000 records[1]
- CVSS basis
- Our assessment
- Technology
- Attack vector
- Impact
- Data type
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Government
What to do nowOur advice
- Beware of emails, calls and texts impersonating the Digital Agency or related bodies [1].
- Do not open unfamiliar links or attachments or enter passwords or card details .
Timeline
Technical details
Remediation
Vendor guidance
- 1Watch for impersonation detect[1]
Do not open links or attachments in messages impersonating agencies.
References
Official / primary1
- [1]
“7月9日、第三者がネットワーク接続機器(VPN)の脆弱性を利用してシステムに侵入し、不正アクセスを行っていたことが判明しました。”
This site aggregates public information and is not security consulting advice. Test remediation steps before applying.