Unauthorized Access to TSD Investor Portal Exposes Personal Data

Thailand Securities Depository Co (TSD) reported unauthorized access to personal data on its TSD Investor Portal, identified on July 26, 2026. The breach resulted in the exposure of some users' personal information, though it did not impact securities trading or investor assets. TSD immediately blocked access to the affected system and implemented enhanced cybersecurity measures. The Securities and Exchange Commission (SEC) is coordinating with TSD to investigate the incident and ensure corrective measures are taken. TSD has notified regulatory authorities and affected individuals, advising them to remain vigilant against phishing attempts. Users are encouraged to change passwords and review the security of their online accounts. The incident underscores the need for stronger cyber defenses in Thailand's financial sector.

Key Points: • Unauthorized access to TSD Investor Portal exposed some users' personal data. • No impact on securities trading or investor assets was reported. • TSD and SEC are coordinating to investigate and enhance cybersecurity measures.