Excessive worry about cyber threats can lead to "security fatigue."

Some web-based services of the central bank would remain inaccessible from 8pm on Monday to 8am on Wednesday as it would carry out emergency system maintenance activities, said the Bangladesh Bank in a notice today.

A high risk of cyber-attacks looms large over 36 per cent of banks in Bangladesh mainly due to a shortage of investment in strengthening security measures, skilled personnel and a lack of awareness among bankers and customers.