Fortinet FortiWeb 400D — End-of-Life & EOSL Dates
Fortinet FortiWeb 400D web application firewall. Published end-of-order (end-of-sale) and end-of-support (EOSL) dates from Fortinet's public hardware Product Life Cycle feed, linked for verification.
Every tracked Fortinet FortiWeb 400D SKU group is past Fortinet end of service life (last group Apr 2026). Units in production should be treated as unsupported. For past-EOSL units, weigh third-party maintenance, spares, replacement, or a documented run-to-failure.
End of sale
Jan 2021 – Apr 2021
Last date of support
Jan 2026 – Apr 2026
Part numbers
2
7
months past last support
Why this score
- Past end of service life — 7 months ago
- Vendor-published date, source-linked
- Category: web application firewall
Support-lifecycle timing and source confidence only. Higher means more runway. It is not a risk, safety or compliance rating. How it is calculated
Past end of support and listed in the CISA Known Exploited Vulnerabilities catalog
3 catalogued vulnerabilities are associated with this product line, 3 of them linked to known ransomware campaigns. CISA lists these as actively exploited. This product is also past its last date of support, so the vendor no longer issues fixes for it. Past support on its own is a planning matter; both together is an audit finding, and for US federal agencies BOD 22-01 sets a remediation deadline.
CISA names product lines and software rather than part numbers, so each row states how it was matched. Confirm against the vendor advisory before acting: this augments vendor data, it does not replace it.
CISA Known Exploited Vulnerabilities catalog · catalogue 2026.08.18 · every tracked product past support and in KEV
Part numbers in this family
Dates vary across 2 groups in this family, so every row carries its own. Find your exact part before you plan.
| Part number | Description | End of sale | Last support | Status |
|---|---|---|---|---|
| FortiWeb-400D | Fortinet FortiWeb-400D web application firewall | Jan 2021 | Jan 2026 | Past support |
| FortiWeb-400D-USG | Fortinet FortiWeb-400D-USG web application firewall | Apr 2021 | Apr 2026 | Past support |
Options from here
The Fortinet FortiWeb 400D is past Fortinet end of service life. These are the paths teams take from here:
Keep it in production past the OEM cutoff with an independent maintainer.
Buy spares now, while units still circulate on the secondary market.
It is unsupported today. Set a migration timeline and budget.
Low-criticality role: document the risk, harden backups, retire on your terms.
Independent and informational. EOSL.ai sells no hardware and no maintenance, and lists no paid placements. Third-party maintenance keeps unsupported gear in production past the OEM cutoff; whether it fits depends on the role the asset plays.
Fortinet FortiWeb 400D — questions
Is the Fortinet FortiWeb 400D end of life?
Yes. Every tracked FortiWeb 400D SKU group is past its last date of support.
What is the last date of support for the FortiWeb 400D?
Last dates of support across FortiWeb 400D SKU groups range from Jan 2026 to Apr 2026.
Where do these FortiWeb 400D dates come from?
Every end-of-sale and end-of-service-life date on this page links to the official Fortinet end-of-sale bulletin it was taken from.
On the same timetable
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