Reported by 2 outlets
Daiwa Securities says info on 110,000 clients may have been leaked in vendor incident
Why this score
- Breadth
- 1.00 / 2.0 · 2 sources
- Authority
- 1.20 / 2.0 · best outlet weight
- Severity
- 0.50 / 5.0 · CVSS + content signals
- Velocity
- 0.00 / 2.0 · updates in 48h
- Pickup speed
- 0.55 / 0.6 · time to second source
- Recency
- × 0.00 temporal multiplier
- Community
- + 0.00 / 1.5 · reddit signal
- Score
- 0.0 / 10 = base × recency + community
Analysis
Daiwa Securities Group disclosed that information on as many as 110,000 clients may have been stolen after attackers breached an external vendor's servers. The Japan Times and another source confirm the scale and link it to a third-party vendor incident rather than a direct breach of Daiwa's core systems. No CVEs are named, and the event focuses on data exposure rather than malware or ransomware.
This is a supply-chain-style breach: the attacker targeted a vendor to reach a major financial institution's client data. The 110,000 figure is specific and comes from the firm's own statement, giving it concrete weight. Financial regulators and clients should treat vendor access controls as the primary risk surface here.
Watch for updates on the vendor identity, whether the attacker demanded ransom, and whether Japanese regulators impose penalties or new vendor-security mandates. Also monitor if the same vendor breach affects other financial clients.
Timeline
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original reporting
Daiwa Securities says info on 110,000 clients may have been leaked in vendor incident
malware.news · 8d ago · October 5th, 2026
Takashi Nakamichi and Ryo Horiuchi report that Daiwa Securities, Japan’s second-largest brokerage and investment banking firm, is responding to a breach at one of its vendors. Daiwa Securities Group said information on as many as 110,000 clients may have been stolen after the servers of an external vendor were hacked. Japan’s second-largest brokerage received a… Source Article Link: Daiwa Securities says info on 110,000 clients may have been leaked in vendor incident - DataBreaches.Net
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update from www.japantimes.co.jp
Daiwa Securities Group said information on as many as 110,000 clients may have been stolen after the servers of an external vendor were hack
www.japantimes.co.jp · 8d ago · October 5th, 2026
Daiwa Securities Group said information on as many as 110,000 clients may have been stolen after the servers of an external vendor were hack
via Mastodon https://www.japantimes.co.jp/business/2026/10/05/companies/daiwa-securities-clients-info-stolen/?utm_medium=Social&utm_source=mastodon