An integer overflow or wraparound vulnerability exists in Fortinet FortiMail versions 7.2 (all versions), 7.4.0 through 7.4.8, 7.6.0 through 7.6.6, and 8.0.0 through 8.0.1. This flaw may allow a remote unauthenticated attacker to cause a denial of service by crashing the FortiMail daemon.