TSD Investor Portal Breach Exposes User Personal Data in Thailand Thailand Securities Depository Co Ltd (TSD) recently detected unauthorized access to its TSD Investor Portal, leading to the exposure of some users’ personal information. The breach was identified and contained promptly, with TSD blocking access to the compromised system and halting further data leakage. In response, the company has enhanced its cybersecurity monitoring and preventive measures while complying with legal obligations, including reporting the incident to regulatory authorities and notifying affected data owners. TSD confirmed that the breach did not impact securities trading, financial data, or assets under its custody. While no financial systems were compromised, TSD warned users to remain vigilant against phishing attempts, including fraudulent emails, SMS messages, or calls impersonating legitimate organizations. The company advised users to avoid clicking suspicious links or sharing passwords and personal details unless the source’s identity is verified. For further details, affected users can contact the TSD Contact Centre (0-2009-9999) or the Stock Exchange of Thailand’s contact centre. Questions regarding securities trading accounts should be directed to individual brokerage firms.