CISA orders fed agencies to patch new Exchange flaw by Monday
CISA has issued an emergency directive ordering all Federal Civilian Executive Branch (FCEB) agencies to mitigate a critical Microsoft Exchange hybrid vulnerability tracked as CVE-2025-53786 by Monday morning at 9:00 AM ET. Federal Civilian Executive Branch (FCEB) agencies are non-military agencies within the US executive branch, including the Department of Homeland Security, Department of the Treasury, Department of Energy, and Department of Health and Human Services. The flaw tracked as CVE-