FortiAuthenticator 4.3 · Version Status
FortiAuthenticator 4.3 End of Life Date
FortiAuthenticator 4.3 end-of-life date, support status, and CVE risk. Data reconciled from official vendor documentation and endoflife.date at every build; the source of each date is on the product page.
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FortiAuthenticator 4.3 is past end of life. This version no longer receives security patches. 1825 days past EOL — migrate to a supported version immediately.
EOL Date
Sep 10, 2021
1825 days past EOL
Latest Release
4.3
Standard release
Release Date
Mar 10, 2017
FortiAuthenticator 4.3 series
Lifecycle detail
FortiAuthenticator 4.3 was released on March 10, 2017 and support ended on September 10, 2021 — a supported lifespan of 4 years and 6 months, in line with the 4 years and 6 months median for FortiAuthenticator releases. It has been without security patches for 5 years. 3 newer FortiAuthenticator releases have shipped since.
Attack Surface
10/30 Medium tier
CISA KEV Exposure
0/20 Not in KEV
Extended Support
0/10 Available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build.
Methodology → ·
View score card →
Extended Support
Extended FortiAuthenticator 4.3 support is available
Commercial vendors offer security patches beyond EOL. Compare your options.
Compare Options →
All FortiAuthenticator Versions
| Version | Latest | EOL Date | Status |
|---|
| 1.0 |
1.0 |
Jul 8, 2014 |
EOL |
| 1.1 |
1.1 |
Sep 21, 2014 |
EOL |
| 1.2 |
1.2 |
Jan 11, 2015 |
EOL |
| 1.3 |
1.3 |
May 14, 2015 |
EOL |
| 2.0 |
2.0 |
Apr 24, 2017 |
EOL |
| 2.1 |
2.1 |
Aug 28, 2017 |
EOL |
| 2.2 |
2.2 |
Oct 19, 2017 |
EOL |
| 3.0 |
3.0 |
Apr 22, 2018 |
EOL |
What does FortiAuthenticator 4.3 end of life mean?
When FortiAuthenticator 4.3 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Running FortiAuthenticator 4.3 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to FortiAuthenticator 8.0 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does FortiAuthenticator 4.3 reach end of life?
FortiAuthenticator 4.3 reached end of life on September 10, 2021. This version is no longer receiving security patches.
Is FortiAuthenticator 4.3 still supported?
No. FortiAuthenticator 4.3 reached end of life on September 10, 2021 and is no longer receiving security patches.
What should I upgrade to from FortiAuthenticator 4.3?
The recommended upgrade from FortiAuthenticator 4.3 is
FortiAuthenticator 8.0 — the latest actively supported version. Check the
FortiAuthenticator full timeline for all supported versions.
What are the security risks of running FortiAuthenticator 4.3 past EOL?
When FortiAuthenticator 4.3 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no remediation path. Most vulnerability scanners do not flag this — it is the CVE blind spot. Organizations running EOL FortiAuthenticator should migrate immediately or implement compensating controls.