Question 1

What is the EOL Risk Score for Fortinet FortiGate appliances (hardware) FortiGate-91E?

Accepted Answer

Fortinet FortiGate appliances (hardware) FortiGate-91E has an EOL Risk Score™ of 50 out of 100, placing it in the Medium risk band. The score is calculated from four factors: EOL Recency (40/40), Attack Surface (10/30), CISA KEV Exposure (0/20), and Extended Support Availability (0/10).

Question 2

Is Fortinet FortiGate appliances (hardware) FortiGate-91E still supported?

Accepted Answer

Fortinet FortiGate appliances (hardware) FortiGate-91E is no longer supported — it has passed its end of life date (May 29, 2023). No further security patches will be issued. Upgrade to a supported version or obtain extended lifecycle support.

Question 3

When does Fortinet FortiGate appliances (hardware) FortiGate-91E reach end of life?

Accepted Answer

Fortinet FortiGate appliances (hardware) FortiGate-91E reached (or will reach) end of life on May 29, 2023. After this date, no security patches or bug fixes are issued by the vendor.

Question 4

What are the security risks of running Fortinet FortiGate appliances (hardware) FortiGate-91E after end of life?

Accepted Answer

After end of life, Fortinet FortiGate appliances (hardware) FortiGate-91E no longer receives security patches. Any newly discovered CVEs remain unpatched indefinitely. Organizations running EOL software also face compliance violations under SOC 2, PCI DSS, HIPAA, and ISO 27001, which require use of supported software versions.