# Sustained censorship in VN (2026-05)

**Country:** 🇻🇳 Vietnam (VN)
**Date:** 2026-05-07
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

OONI detected 13 days of elevated network interference averaging 63.4% anomaly rate.

## Metrics

- Confidence: 77%
- Measurements: 13
- Anomaly Rate: 63.4%

## Evidence

- **OONI** (measurement): OONI tor: 10/15 measurements anomalous (66.7%)
  - Observed: 2026-05-31
  - Confidence: 77%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=tor&since=2026-05-31&until=2026-05-31&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 6/9 measurements anomalous (66.7%)
  - Observed: 2026-05-30
  - Confidence: 77%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=facebook_messenger&since=2026-05-30&until=2026-05-30&only=anomalies)
- **OONI** (measurement): OONI web_connectivity for claude.ai: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-05-28
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=web_connectivity&domain=claude.ai&since=2026-05-28&until=2026-05-28)
- **OONI** (measurement): OONI tor: 8/14 measurements anomalous (57.1%)
  - Observed: 2026-05-27
  - Confidence: 73%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=tor&since=2026-05-27&until=2026-05-27&only=anomalies)
- **OONI** (measurement): OONI tor: 5/9 measurements anomalous (55.6%)
  - Observed: 2026-05-24
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=tor&since=2026-05-24&until=2026-05-24&only=anomalies)
- **OONI** (measurement): OONI tor: 7/13 measurements anomalous (53.8%)
  - Observed: 2026-05-22
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=tor&since=2026-05-22&until=2026-05-22&only=anomalies)
- **OONI** (measurement): OONI tor: 5/9 measurements anomalous (55.6%)
  - Observed: 2026-05-20
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=tor&since=2026-05-20&until=2026-05-20&only=anomalies)
- **OONI** (measurement): OONI tor: 5/10 measurements anomalous (50.0%)
  - Observed: 2026-05-15
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=tor&since=2026-05-15&until=2026-05-15&only=anomalies)
- **OONI** (measurement): OONI tor: 8/16 measurements anomalous (50.0%)
  - Observed: 2026-05-11
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=tor&since=2026-05-11&until=2026-05-11&only=anomalies)
- **OONI** (measurement): OONI tor: 9/14 measurements anomalous (64.3%)
  - Observed: 2026-05-09
  - Confidence: 76%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=tor&since=2026-05-09&until=2026-05-09&only=anomalies)
- **OONI** (measurement): OONI tor: 4/5 measurements anomalous (80.0%)
  - Observed: 2026-05-08
  - Confidence: 82%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=tor&since=2026-05-08&until=2026-05-08&only=anomalies)
- **OONI** (measurement): OONI tor: 9/17 measurements anomalous (52.9%)
  - Observed: 2026-05-08
  - Confidence: 71%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=tor&since=2026-05-08&until=2026-05-08&only=anomalies)
- **OONI** (measurement): OONI tor: 5/7 measurements anomalous (71.4%)
  - Observed: 2026-05-07
  - Confidence: 79%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=VN&test_name=tor&since=2026-05-07&until=2026-05-07&only=anomalies)

## What we cannot say

- **Who caused it** — measurement data alone does not attribute the interference to any government, ISP, or other actor.
- **Intent** — anomalous or unreachable measurements indicate interference, not a stated motive or a deliberate-vs-incidental determination.
- **Which networks** — no specific ASN/ISP is identified for this incident.
- **Sub-national scope** — measurement is aggregated at the country level; we cannot localize to a province, city, or network segment.
- **Independent corroboration** — this rests on a single source; treat it as a single-source signal, not a multi-source confirmation.

## Data Sources

ooni

## Citation

Voidly Research. (2026). Sustained censorship in VN (2026-05) [VN-2026-0202]. Retrieved from https://voidly.ai/incident/VN-2026-0202

---
*Report generated by Voidly Research on 2026-06-21*
*Data licensed under CC BY 4.0*
*Incident ID: VN-2026-0202*
*Permalink: https://voidly.ai/incident/VN-2026-0202*