Vietnam experienced a brief but significant degradation in internet connectivity early on August 23, 2026. The disruption began at 01:20 UTC and lasted approximately 30 minutes, with a severity score of 699. The primary impact was observed in active reachability measurements across the country’s IPv4 address space.
Technical Details
The ping-slash24 signal, which measures ICMP reachability across IPv4 /24 network prefixes, recorded a 25% drop from its peak during the event. The signal’s median value fell to 26,827 reachable prefixes from a high of 35,738. The country’s Border Gateway Protocol (BGP) control plane, which advertises network routes, remained stable with no observable drop. The cause has not been publicly attributed. Connectivity was reported restored by 01:50 UTC.
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