NHK: a notice mail was sent to every registrant of its information system by mistake, exposing 32,940 email addresses to other recipients

A worker at an NHK contractor addressed a mail to all registrants of its information system, so 32,940 email addresses were visible to recipients.

Disclosed

2026-03-18

Organizations involved

Leaked or at risk

32.9K

32,940

Downtime

Unknown

What happened

2026-03-17
A worker at an external contractor sent a mail with all registrants of the information system selected as recipients. [1]
2026-03-18
It announced the mail sent to information system registrants by mistake. [1] [2]

The email addresses of 32,940 people were sent in a way recipients could see. [1]

[Breached][Major]Tokyo, ShibuyaInformation and communications32,940 leaked
NHK (Japan Broadcasting Corporation)
The email addresses of information system registrants were sent in a way other recipients could see them.

						Note
NHK (Japan Broadcasting Corporation)	[Breached]	[Major]	Tokyo, Shibuya	Information and communications	32,940	The email addresses of information system registrants were sent in a way other recipients could see them.