INSPECTING ARCHIVED INTELLIGENCE (OUTDATED VERSION).

Shinhan Bank API Attack Discloses 1454 Individuals' Personal Information

| 2026-10-29 18:38 CRITICAL LOW DATA BREACH
JSON
Executive Summary
AI-generated
Shinhan Bank suffered a data breach on October 29, 2026, after an external attacker targeted its member information API, resulting in the exposure of 1,454 individuals' personal data. The attackers exploited the API's path to retrieve customer information, and Shinhan Bank has blocked related system access and plans to send individual notifications to affected customers. Due to the release of personal information, customers are advised to be cautious of phishing messages or emails related to flight ticket reservations or refund notifications. Customers can check the authenticity of the data breach and report any losses through the Shinhan Bank customer service center or the Personal Information Breach Reporting Center email. The attackers' tactics included exploiting a vulnerability in the API's path, which allowed them to retrieve sensitive information without authorization. As of now, no further details on the attack duration or specific timing are available, but Shinhan Bank has announced its commitment to preventing further incidents and will conduct an investigation into the incident.
Technical Mitigations AI-generated
• Block access to confirmed attack systems and completely delete them. • Conduct a thorough review of security systems and vulnerabilities, operating a 24-hour emergency monitoring system. • Notify individual customers who have experienced data breaches via email.
Intelligence Metadata
Actors / Malware / CVEs / Campaigns
Target & Sectors
Global Scope financefinance
Incident Timeline
‎October 28
Threat actors used an IP to target Shinhan Bank's member information inquiry API on October 28, resulting in the disclosure of approximately 1,454 individuals' personal information.
organisation IP
Shinhan Bank took protective measures on October 28, including confirming the attack facts and blocking the attacking IP.
‎October 29
Threat actors exploited Shinhan Bank's member information inquiry API, resulting in the unauthorized disclosure of 1,454 individuals' personal data.
‎2026/10/29
Threat actors targeted Shinhan Bank's member information inquiry API, resulting in the disclosure of 1,454 individuals' personal data.
organisation the Personal Information Breach Reporting Center
Customers can check the authenticity of the data breach and report any losses through the Shinhan Bank customer service center or the Personal Information Breach Reporting Center email.
organisation Shinhan Bank
Shinhan Bank, API attack on member information inquiry API results in disclosure of 1,454 individuals' personal information..
organisation API
Shinhan Bank, API attack on member information inquiry API results in disclosure of 1,454 individuals' personal information..
Intelligence Sources
Dailysecu 2026-10-29