🛡️ **BREAKING: FortiMail Zero-Day Under Active Exploitation — Unauthenticated File Write Vulnerability**
Published Thursday, October 01, 2026 at 11:57 PM PT BLUF: Fortinet has issued a critical alert for a zero-day vulnerability in FortiMail that permits unauthenticated remote attackers to write arbitrary files to affected systems. The flaw is actively being exploited in targeted attacks. Organizations with internet-exposed FortiMail appliances must assess exposure immediately and prepare for emergency vendor patch deployment upon availability. ...