FortiMail 5.3 · Version Status
FortiMail 5.3 End of Life Date
FortiMail 5.3 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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FortiMail 5.3 is past end of life. This version no longer receives security patches. 2293 days past EOL — migrate to a supported version immediately.
EOL Date
May 30, 2020
2293 days past EOL
Latest Release
5.3
Standard release
Release Date
Nov 30, 2015
FortiMail 5.3 series
Lifecycle detail
FortiMail 5.3 was released on November 30, 2015 and support ended on May 30, 2020 — a supported lifespan of 4 years and 6 months, in line with the 4 years and 6 months median for FortiMail releases. It has been without security patches for 6 years and 3 months. 5 newer FortiMail 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 FortiMail 5.3 support is available
Commercial vendors offer security patches beyond EOL. Compare your options.
Compare Options →
| Version | Latest | EOL Date | Status |
|---|
| 2.8 |
2.8 |
Jan 15, 2010 |
EOL |
| 3.0 |
3.0 |
Aug 3, 2010 |
EOL |
| 3.1 |
3.1 |
Nov 1, 2010 |
EOL |
| 3.2 |
3.2 |
Dec 24, 2010 |
EOL |
| 3.3 |
3.3 |
Apr 18, 2011 |
EOL |
| 3.4 |
3.4 |
Aug 1, 2011 |
EOL |
| 3.5 |
3.5 |
May 7, 2012 |
EOL |
| 4.0 |
4.0 |
Nov 24, 2012 |
EOL |
What does FortiMail 5.3 end of life mean?
When FortiMail 5.3 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 FortiMail 5.3 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to FortiMail 8.0 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does FortiMail 5.3 reach end of life?
FortiMail 5.3 reached end of life on May 30, 2020. This version is no longer receiving security patches.
Is FortiMail 5.3 still supported?
No. FortiMail 5.3 reached end of life on May 30, 2020 and is no longer receiving security patches.
What should I upgrade to from FortiMail 5.3?
The recommended upgrade from FortiMail 5.3 is
FortiMail 8.0 — the latest actively supported version. Check the
FortiMail full timeline for all supported versions.
What are the security risks of running FortiMail 5.3 past EOL?
When FortiMail 5.3 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 FortiMail should migrate immediately or implement compensating controls.