Zimbra 9.0 · Version Status
Zimbra 9.0 End of Life Date
Zimbra 9.0 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
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Zimbra 9.0 is past end of life. This version no longer receives security patches. 419 days past EOL — migrate to a supported version immediately.
EOL Date
Jun 30, 2025
419 days past EOL
Latest Release
9.0.0 P46
Standard release
Release Date
Apr 7, 2020
Zimbra 9.0 series
Lifecycle detail
Zimbra 9.0 was released on April 7, 2020 and support ended on June 30, 2025 — a supported lifespan of 5 years and 3 months, in line with the 5 years and 3 months median for Zimbra releases. It was not an LTS release; Zimbra reserves longer patch windows for its LTS versions. The last patch it will ever receive is 9.0.0 P46, published June 18, 2025 — 12 days before support ended. It has been without security patches for 1 year and 2 months.
Attack Surface
10/30 Medium tier
CISA KEV Exposure
20/20 Named in CISA 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 Zimbra 9.0 support is available
Commercial vendors offer security patches beyond EOL. Compare your options.
Compare Options →
| Version | Latest | EOL Date | Status |
|---|
| 8.8.15 LTS |
— |
Dec 31, 2024 |
EOL |
| → 9.0 |
9.0.0 P46 |
Jun 30, 2025 |
EOL |
| 10.0 |
10.0.18 |
Jun 30, 2025 |
EOL |
| 10.1 |
10.1.20 |
EOL |
Active |
What does Zimbra 9.0 end of life mean?
When Zimbra 9.0 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 Zimbra 9.0 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Zimbra 10.1 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Zimbra 9.0 reach end of life?
Zimbra 9.0 reached end of life on June 30, 2025. This version is no longer receiving security patches.
Is Zimbra 9.0 still supported?
No. Zimbra 9.0 reached end of life on June 30, 2025 and is no longer receiving security patches.
What should I upgrade to from Zimbra 9.0?
The recommended upgrade from Zimbra 9.0 is
Zimbra 10.1 — the latest actively supported version. Check the
Zimbra full timeline for all supported versions.
What are the security risks of running Zimbra 9.0 past EOL?
When Zimbra 9.0 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 Zimbra should migrate immediately or implement compensating controls.