Fortinet warns of critical FortiMail flaw exploited in zero-day attacks

Fortinet has warned of a critical security flaw in its FortiMail product that is currently being exploited in active zero-day attacks, posing significant risks to affected organisations.

This Wire brief sits within Fusion42's coverage of Cybersecurity and Security Infrastructure, and 2 sources have reported it between 2 Oct 2026 and 3 Oct 2026.