FortiBleed Leak Exposes Fortinet VPN Credentials for 73,000 Devices
In June 2026, a significant data breach known as 'FortiBleed' exposed VPN credentials for approximately 73,000 Fortinet devices worldwide. Security researcher Bob Diachenko discovered a server containing valid Fortinet VPN credentials, including usernames, email addresses, and plaintext passwords. The leaked data encompassed entries from major organizations such as Chevron, Samsung, Foxconn, Comcast, AT&T, Mercedes-Benz, Toyota, Sinopec, and State Grid. The breach was attributed to a Russian-speaking threat group that conducted extensive credential harvesting campaigns against FortiGate SSL VPN devices, leading to unauthorized access and potential lateral movement within affected networks. This incident underscores the escalating threat posed by sophisticated cyber actors targeting critical infrastructure through credential harvesting and exploitation of VPN vulnerabilities. Organizations are urged to implement robust security measures, including regular credential rotation, enforcement of multi-factor authentication, and continuous monitoring for unauthorized access attempts, to mitigate the risk of similar breaches.
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