Kiteworks Tells Customers to Shut Down File-Transfer Systems Over Attack Threat

Kiteworks told customers on September 25, 2026 to shut down file-transfer systems before the weekend because of an imminent cyberattack threat. Chief security officer Frank Balonis pointed to credible information shared by law enforcement. The company said it had seen no breach so far. Central European customers were told to stay offline September 26 from 4 a.m. to 10 a.m.