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SoftBank

SoftBank Vendor Cyber Rating & Cyber Score

softbank.jp
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Embarking on a new stage of the Information Revolution with a "Beyond Carrier"​ strategy SoftBank Corp. (TOKYO: 9434) continues to push forward into a new stage of the Information Revolution by utilizing state-of-the-art technology such as AI, IoT, and robotics, and plays a central role in the SoftBank Group. We aim to take a flexible approach to expanding our business into a wide range of domains while pursuing synergies with group companies both domestically and overseas. We aspire to be a company that contributes to society by providing innovative services across a range of industries, going beyond the realms of conventional telecommunications carrier business models. Corporate Philosophy: "Information Revolution — Happiness for


SoftBank A.I CyberSecurity Scoring

Incident Details
SoftBank
Company Information
Website:https://www.softbank.jp
Employees number:4,278
Number of followers:44,182
NAICS:5415
Industry Type:IT Services and IT Consulting
Homepage:softbank.jp
Cyber Premium EstimationGet Supply Chain
SoftBank Risk Score (AI oriented)
Between 650 and 699
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SoftBankIT Services and IT Consulting
Updated:
01/04/2026
698/1000
Weak
B
AaaAaABaaBaBCaaCaC
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SoftBank Global Score (TPRM)
xxxx
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SoftBankIT Services and IT Consulting
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Findings

SoftBank
SoftBankWeak
Current Score
698B (WEAK)
01000
1 incidents
0 avg impact
Incident timeline with MITRE ATT&CK tactics, techniques, and mitigations.
JUNE 2026
702Before Incident
MAY 2026
700Before Incident
APRIL 2026
700Before Incident
MARCH 2026
698Before Incident
FEBRUARY 2026
697Before Incident
JANUARY 2026
696Before Incident
DECEMBER 2025
693Before Incident
NOVEMBER 2025
693Before Incident
OCTOBER 2025
691Before Incident
SEPTEMBER 2025
690Before Incident
AUGUST 2025
689Before Incident
JULY 2025
687Before Incident
JUNE 2025
763Before Incident
Breach
12 Jun 2025 • SoftBank
SoftBank Corporation

SoftBank Data Breach

684After Incident
CRITICAL-79
SOF606061225
SoftBank Corporation, an investment holding company, faced a significant data breach affecting 137,156 mobile subscribers through compromised third-party infrastructure. The incident involved the unauthorized access to customer names, residential addresses, and phone numbers stored within the systems of UF Japan, an external service provider contracted for telecommunications support operations. The breach did not extend to more sensitive financial data elements, but it highlighted critical failures in vendor security management and persistent vulnerabilities in outsourced data processing operations. The incident exposed the complexity of managing security across multi-vendor environments and the challenges of detecting insider threats.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
Customer namesResidential addressesPhone numbers
DATA BREACH
Customer namesResidential addressesPhone numbersNumber Of Records Exposed: 137,156
REFERENCES
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