Kiteworks recommends server shutdown pending possible attack
On September 25, 2026, reports emerged that Kiteworks (formerly Acellion) emailed customers that law enforcement alerted them about an “imminent” cyberattack on Kiteworks systems, possibly caused by exploitation of a zero-day vulnerability. Kiteworks reportedly advised customers to shut down servers between 02:00 and 08:00 UTC on September 26, if not sooner, as a “precautionary” measure.