Inside FortiBleed: Reverse Engineering the CyberStrike Harvester Behind a Global FortiGate Credential Factory

Reported 24 Jun 2026 by otx · Severity: medium

FortiBleed is a large-scale credential compromise campaign targeting internet-facing Fortinet FortiGate firewalls and SSL VPN gateways globally. The operation employs a sophisticated credential pipeline utilizing credential stuffing, password spraying, configuration harvesting, o