Question 1

What is the EOL Risk Score for Fortinet security appliances (hardware) FortiWeb-400D-USG?

Accepted Answer

Fortinet security appliances (hardware) FortiWeb-400D-USG has an EOL Risk Score™ of 40 out of 100, placing it in the Medium risk band. The score is calculated from four factors: EOL Recency (30/40), Attack Surface (10/30), CISA KEV Exposure (0/20), and Extended Support Availability (0/10).

Question 2

Is Fortinet security appliances (hardware) FortiWeb-400D-USG still supported?

Accepted Answer

Fortinet security appliances (hardware) FortiWeb-400D-USG is no longer supported — it has passed its end of life date (April 1, 2026). No further security patches will be issued. Upgrade to a supported version or obtain extended lifecycle support.

Question 3

When does Fortinet security appliances (hardware) FortiWeb-400D-USG reach end of life?

Accepted Answer

Fortinet security appliances (hardware) FortiWeb-400D-USG reached (or will reach) end of life on April 1, 2026. After this date, no security patches or bug fixes are issued by the vendor.

Question 4

What are the security risks of running Fortinet security appliances (hardware) FortiWeb-400D-USG after end of life?

Accepted Answer

After end of life, Fortinet security appliances (hardware) FortiWeb-400D-USG 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.