Active Incident
Confirmed: sustained censorship in Vietnam (2026-03)
Vietnam · March 1, 2026 · 28 days
OONI detected 61 days of elevated network interference averaging 67.1% anomaly rate.
Evidence
67%
Anomaly Rate
61
Measurements
77%
Confidence
What This Means
67% of 61 network tests from Vietnam failed to reach these services. Global baseline failure rate is typically 1-3%. This 64+ percentage point difference strongly indicates intentional blocking.
How We Detected This
Data Sourceooni
ML ModelGradientBoosting v3.3 (LOCO median F1 0.87, honest across 127 countries)
Confidence Score77% certainty of censorship
Detection TimeMarch 1, 2026
Corroborating Evidence (61)
Evidence collected from multiple independent sources. Upstream claims shown in quotes are not Voidly assertions.
OONIOpen Observatory of Network Interference61 records
tor-blocking
"OONI tor: 4/7 measurements anomalous (57.1%)"— OONI report
Signal value: 0.57
Mar 29, 2026
View source →tor-blocking
"OONI tor: 12/21 measurements anomalous (57.1%)"— OONI report
Signal value: 0.57
Mar 27, 2026
View source →tor-blocking
"OONI tor: 12/24 measurements anomalous (50.0%)"— OONI report
Signal value: 0.50
Mar 27, 2026
View source →tor-blocking
"OONI tor: 12/16 measurements anomalous (75.0%)"— OONI report
Signal value: 0.75
Mar 17, 2026
View source →tor-blocking
"OONI tor: 10/20 measurements anomalous (50.0%)"— OONI report
Signal value: 0.50
Mar 17, 2026
View source →+ 56 more OONI records
Affected Services (1)
Tor
What we cannot say
- Who caused it — measurement data alone does not attribute this 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.
- The mechanism — we cannot state whether this was DNS tampering, TLS/SNI reset, an HTTP blockpage, throttling, or an infrastructure outage.
- 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.
Cite This Incident
Voidly Research. (2026). Confirmed: sustained censorship in Vietnam (2026-03) [VN-2026-0201]. Voidly Global Censorship Index. https://voidly.ai/incident/VN-2026-0201