Sumitomo Mitsui Banking Corporation submitted a report summarizing the causes of the system failure that occurred during the Golden Week holidays to the Financial Services Agency.
In this, it turned out that the system that connects the external service to the bank reported that it was caused by insufficient verification of the function test during the update work performed in the past. ..
At Sumitomo Mitsui Banking Corporation, during the long holidays, there was a problem that the connection between the bank's core system and the ATM = automatic teller machine became unstable. It has become difficult to use payment service charges.
On the 9th, the bank submitted a report to the Financial Services Agency summarizing the causes of this disorder.
According to the people concerned, the root cause of the failure is a system that connects external services such as ATM transactions at convenience stores to banks. It mentions that the verification of the test for the function that was done was insufficient.
For this reason, as a measure to prevent recurrence, banks are strengthening the verification of the development contents of outsourced companies due to system update work.
The Financial Services Agency will inspect the implementation status of recurrence prevention measures in the future, and will urge other financial institutions to inspect so that there will be no problems with connections to external services.