Company

SMBC Nikko Securities Inc.

SMBC Nikko Securities Inc. (Chiyoda, Tokyo; Finance and insurance) appears in 2 related cybersecurity incidents. The latest was disclosed on 2025-03-25.

Profile

Industry/type: Finance and insurance
Location: Tokyo, Chiyoda
Website: https://www.smbcnikko.co.jp/

Public figures

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Metric	Value	Scope	As of	Source
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Incident history

Disclosed 2025-03-25Updated 2026-01-14 16:33Tokyo[Contained][Severity: Critical][Breached][Critical]
Rakuten Securities, SBI Securities and others: accounts were taken over with phishing-stolen credentials, and holdings were sold to buy Chinese stocks
[Phishing][Credential abuse][Malware][Fraud][Financial loss]Organizations 6
Disclosed 2021-03-08Updated 2021-03-11 08:05Tokyo[Resolved][Severity: Major][Breached][Major]
SMBC Trust Bank and SMBC Nikko Securities: a permission error in their cloud account-opening systems left data of up to 118,764 people viewable from outside
[Misconfiguration][Data leak]Leaked 118.8KOrganizations 2

		Incident	Role	Impact level				Methods	Impacts		Status
2025-03-25	2026-01-14 16:33	Rakuten Securities, SBI Securities and others: accounts were taken over with phishing-stolen credentials, and holdings were sold to buy Chinese stocks	[Breached]	[Critical]	[Critical]	6 Nomura Securities Co., Ltd., SBI SECURITIES Co., Ltd., Matsui Securities Co., Ltd., Monex, Inc., Rakuten Securities, Inc., SMBC Nikko Securities Inc.	Tokyo	[Phishing][Credential abuse][Malware]	[Fraud][Financial loss]	Unknown	[Contained]
2021-03-08	2021-03-11 08:05	SMBC Trust Bank and SMBC Nikko Securities: a permission error in their cloud account-opening systems left data of up to 118,764 people viewable from outside	[Breached]	[Major]	[Major]	2 SMBC Trust Bank Ltd., SMBC Nikko Securities Inc.	Tokyo	[Misconfiguration]	[Data leak]	118,764	[Resolved]