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Global Financial Service Disruptions

Docomo SMTB Net Bank

digital bank · JP · East Asia · 株式会社ドコモSMTBネット銀行

Technical failureStatus: resolvedTier 2Severity 1 of 5Evidence confidence: highAnalyst-verified

On 23 Oct 2026 from about 16:30 to 17:06 JST a system fault left some Docomo SMTB Net Bank customers unable to use its services. The bank said the cause was not an external cyberattack. Ten days later the same bank suspended its corporate bulk transfer service (separate record).

Original: 弊社システムに不具合が発生し、一部のお客さまにおいて、弊社サービスをご利用いただけない事象が生じました。本事象は、外部からのサイバー攻撃に起因するものではありません。

First disruption
Oct 23 07:30 UTC
First public signal
Oct 23 (bank apology notice)
Acknowledged
Oct 23
Restored
Oct 23 08:06 UTC
Duration
0.6 hours
DFX first recorded
Nov 5 14:58 UTC

What was restricted

online bankingmobile appScope: institution wide

Some customers could not use the bank's services for about 36 minutes; specific services not named.

Cause, kept in separate layers

What the institution said
Malfunction in the bank's own system; bank states it was not caused by an external cyberattack
DFX classification
Technical failure (cyber: ruled out)
Wording used
一部のお客さまにおいて、弊社サービスをご利用いただけない事象, 外部からのサイバー攻撃に起因するものではありません

Evidence