---
title: "Vietnam Airlines security incident"
description: "What the retained public evidence establishes about the Vietnam Airlines incident, its attack path, impact, and response."
incident_type: "Cybersecurity incident"
status: "active"
last_modified: "2026-09-19"
canonical_url: "https://www.ally.security/incidents/vietnam-airlines-security-incident-2025"
markdown_url: "https://www.ally.security/incidents/vietnam-airlines-security-incident-2025.md"
stix_url: "https://www.ally.security/incidents/vietnam-airlines-security-incident-2025/stix.json"
---

# Vietnam Airlines security incident

Voice phishing induced personnel to authorize a malicious connected OAuth application in Salesforce. Customer data exposed and leaked.

Last modified Sep 19, 2026 · 1 source

## Summary

- **Environment:** Aviation
- **Operational impact:** Customer data exposed and leaked
- **Financial impact:** No financial figure is established by the reviewed source evidence

## What happened

In 2025, Vietnam Airlines experienced an incident in its aviation environment. The retained source describes the attack path as follows: Voice phishing induced personnel to authorize a malicious connected OAuth application in Salesforce. [1](#source-1)

The documented consequence was: Customer data exposed and leaked. [1](#source-1)

## Impact

- Documented impact: Customer data exposed and leaked. [1](#source-1)
- No financial loss, ransom amount, recovery cost, or regulatory penalty is established by the reviewed source evidence.

## Threat Group & Attack Vector

The retained source describes the attack path as follows: Voice phishing induced personnel to authorize a malicious connected OAuth application in Salesforce. The canonical record does not add intrusion steps beyond those supported by the source. [1](#source-1)

### Actors

- No threat actor group has been identified in the reviewed public evidence.

### TTPs

- [T1566 — Phishing](https://attack.mitre.org/techniques/T1566/) — mapped from the cited behavior. [1](#source-1)
- [T1528 — Steal Application Access Token](https://attack.mitre.org/techniques/T1528/) — mapped from the cited behavior. [1](#source-1)

## Response

The reviewed source does not describe containment, notification, or restoration steps in enough detail to summarize them responsibly.

This account is bounded to [Information regarding customer data breach](https://www.vietnamairlines.com/bh/en/vietnam-airlines/press-room/press-release/2025/1014-EN-Information-Regarding-Customer-Data-Breach). Details absent from that evidence are left unresolved rather than inferred. [1](#source-1)

## Assets

[Download the case-scoped STIX 2.1 bundle](<https://www.ally.security/incidents/vietnam-airlines-security-incident-2025/stix.json>)

## Sources

Primary source records used to research this incident.

<a id="source-1"></a>

### Information regarding customer data breach

official · Vietnam Airlines

<https://www.vietnamairlines.com/bh/en/vietnam-airlines/press-room/press-release/2025/1014-EN-Information-Regarding-Customer-Data-Breach>

<details>
<summary>Evidence ledger</summary>

Review the supporting structured claims.

1. **Used Attack Technique · 90% confidence · current**  
   Vietnam Airlines security incident: https://attack.mitre.org/techniques/T1566/
2. **Used Attack Technique · 90% confidence · current**  
   Vietnam Airlines security incident: https://attack.mitre.org/techniques/T1528/
3. **Resulted In · 82% confidence · current**  
   Vietnam Airlines security incident: Voice phishing induced personnel to authorize a malicious connected OAuth application in Salesforce.
4. **Resulted In · 88% confidence · current**  
   Vietnam Airlines security incident: Customer data exposed and leaked.
5. **Affected Organization · 100% confidence · current**  
   Vietnam Airlines security incident: Vietnam Airlines
6. **Resulted In · 100% confidence · current**  
   Vietnam Airlines security incident: The reviewed source documents the vietnam airlines security incident involving Vietnam Airlines.

</details>