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.
Source: https://www.nationthailand.com/business/trading-investment/40069083
Thailand Securities Depository Co Ltd TPRM report: https://www.rankiteo.com/company/central-securities-depository-kcsd
"id": "cen1785133778",
"linkid": "central-securities-depository-kcsd",
"type": "Breach",
"date": "7/2026",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'customers_affected': 'Some users',
'industry': 'Securities Depository',
'location': 'Thailand',
'name': 'Thailand Securities Depository Co Ltd (TSD)',
'type': 'Financial Services'}],
'customer_advisories': 'Advised users to remain vigilant against phishing '
'attempts, avoid clicking suspicious links, and verify '
'the source’s identity before sharing passwords or '
'personal details. Contact TSD Contact Centre '
'(0-2009-9999) or the Stock Exchange of Thailand’s '
'contact centre for further details.',
'data_breach': {'personally_identifiable_information': 'Yes',
'sensitivity_of_data': 'High',
'type_of_data_compromised': 'Personal information'},
'description': '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.',
'impact': {'data_compromised': 'Personal information',
'identity_theft_risk': 'High',
'systems_affected': 'TSD Investor Portal'},
'recommendations': 'Users advised to remain vigilant against phishing '
'attempts, avoid clicking suspicious links, and verify the '
'source’s identity before sharing passwords or personal '
'details',
'references': [{'source': 'TSD Contact Centre'},
{'source': 'Stock Exchange of Thailand’s contact centre'}],
'regulatory_compliance': {'regulatory_notifications': 'Reported to regulatory '
'authorities'},
'response': {'communication_strategy': 'Reported to regulatory authorities '
'and notified affected data owners; '
'advised users on phishing risks',
'containment_measures': 'Blocked access to the compromised '
'system and halted further data leakage',
'enhanced_monitoring': 'Yes',
'incident_response_plan_activated': 'Yes',
'remediation_measures': 'Enhanced cybersecurity monitoring and '
'preventive measures'},
'title': 'TSD Investor Portal Breach Exposes User Personal Data in Thailand',
'type': 'Data Breach'}