Dentsu Digital marketing platform TONARIWA breached via stolen admin credentials; LINE tokens may be exposed and Japan Post suspends LINE account

Dentsu Digital announced on Nov 11 that an admin account used in the infrastructure of its TONARIWA marketing platform was accessed by a third party after its credentials leaked, with privileges escalated, and the service was suspended ^[1]. Data that may have leaked includes names, birth dates and contact details of some client companies' end users, plus admin account data including LINE official account integration access tokens, and the company cannot rule out unauthorized message sending ^[1]. Japan Post said its LINE account "Post Office [Posukuma]", operated with Dentsu Digital, was affected and has been under emergency maintenance since 14:20 on Nov 11 ^[2].

Industries mainly affected: Transportation & logistics, Professional services

Japan Post said its LINE account "Post Office [Posukuma]", operated with Dentsu Digital, was affected and has been under emergency maintenance since 14:20 on Nov 11 ^[2]