Kinryu Labs discovered an unsecured Elasticsearch cluster named 'pax-info' hosted on Viettel-assigned IP space in Hanoi containing 220.8 million Advance Passenger Information System records across 29 indices and roughly 107GB. Exposed fields included names, dates of birth, nationalities, passport and travel-document numbers, flight numbers, airline details, seat assignments and baggage references, covering January 2017 to April 2026. The operator could not be definitively identified; researchers notified Vietnamese authorities, airlines and national CERTs on 3 June and the database was secured by 8 June, with public disclosure following on 8 September. Affected travellers span Asia-Pacific, Europe and the Middle East, and absent server logs no conclusion could be drawn on prior theft.
Summary
Sources
Attribution
Unattributed - security misconfiguration, no confirmed threat actor access
VietnamEU relevance
Medium
Hit transportation and aviation in Vietnam, where the EU has Infrastructure & Transport projects
Graded by rules: EU member states affected, EU response, EU sanctions, EU projects in the sector hit.