2026 Daiwa Securities — Scala Communications vendor hack; up to 110k clients
Data compromised
Client names and account numbers (up to ~110,000). Daiwa states data cannot access securities accounts or online trading; no inappropriate transactions detected; Daiwa’s own systems not breached
Technical writeup
Verified Daiwa Securities Group statement (Japan Times / DataBreaches Oct 5, 2026). Vendor Scala Communications reported Saturday (Oct 4) evidence that client data leaked after unauthorized access to its servers. Up to 110,000 Daiwa clients may be affected (names and account numbers). Daiwa says its own systems were not breached and the data cannot be used for online trading; no related inappropriate transactions detected. companyConfirmed true; recordsAffected 110000.
Root cause
Unauthorized access to servers of external vendor Scala Communications holding Daiwa client data (vendor report to Daiwa)