SmarterTools announced that the Warlock ransomware gang breached its network by exploiting an unpatched SmarterMail instance on January 29, 2026. The company’s Chief Commercial Officer, Derek Curtis, revealed that the compromised mail server had not been updated to the latest version. Before the attack, SmarterTools operated around 30 servers and virtual machines. This incident underscores the importance of regular software updates to prevent security vulnerabilities.
