Cybersecurity Alert: Hackers Claim Breach of Major Colombian Banks, Leak Customer Data Hackers have alleged a data breach affecting two of Colombia’s largest financial institutions Grupo Bancolombia and Banco de Bogota posting samples of purportedly stolen customer data on an underground forum. The claims, made by a single threat actor on DarkForums, remain unverified, but the leaked materials raise concerns about potential exposure. For Bancolombia, the published data includes names, login timestamps, and limited client details in PDF format, such as adviser locations and insurance plans. While the absence of direct contact information may reduce immediate fraud risks, researchers warn that cross-referencing with other breached datasets could enable more sophisticated attacks, including social engineering and phishing campaigns. In contrast, the Banco de Bogota samples appear more sensitive, containing around 30 records with names, phone numbers, and physical addresses, increasing the risk of targeted fraud. Neither bank has publicly responded to the claims, and independent verification of the breach is still pending. The incident underscores the growing cybersecurity threats facing Latin American financial institutions, where large customer bases and expanding digital services create attractive targets. Bancolombia serves approximately 30 million clients across multiple countries, while Banco de Bogota has nearly 10 million customers and over 15,000 employees, highlighting the potential scale of impact if the breach is confirmed.