Azul Zulu 21 · Version Status
Azul Zulu 21 End of Life Date
Azul Zulu 21 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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Azul Zulu 21 is actively supported. EOL date: September 2031.
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EOL Date
Sep 2031
EOL in September 2031
Latest Release
21.52.203
LTS release
Release Date
Sep 19, 2023
Azul Zulu 21 series
Extended Support
Sep 2033
Azul Platform Core · paid
Where these dates come from
End of lifeSep 2031Vendor's own page, checked by a person · azul.com · checked Sep 24, 2026high · 2 sources agree End of extended supportSep 2033Vendor's own page, checked by a person · azul.com · checked Sep 24, 2026high · 2 sources agree ReleaseSep 19, 2023Vendor's own page, checked by a person · azul.com · checked Sep 24, 2026high · 2 sources agree Confidence: high = two or more independent sources agree (the vendor's page read by our adapter, a person's check against the vendor, the dataset the date came from); medium = one; low = the vendor page disagrees or our last read is stale.
How we source dates.
Lifecycle detail
Azul Zulu 21 was released on September 19, 2023 and support is scheduled to end in September 2031 — a planned supported lifespan of 8 years, in line with the 8 years and 1 month median for Azul Zulu LTS releases. It is a long-term support (LTS) release, so it carries a longer patch window than the interim releases around it. Its most recent patch is 21.52.203, published August 18, 2026.
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 →
| Version | Latest | EOL Date | Status |
|---|
| 7 LTS |
7.56 |
Jul 2022 |
EOL |
| 6 LTS |
N/A |
Dec 2018 |
EOL |
| 8 LTS |
8.96.0.205 |
Dec 2030 |
Active |
| 9 (STS) |
9.0.7.1 |
Mar 31, 2018 |
EOL |
| 10 (STS) |
10.3.5 |
Sep 30, 2018 |
EOL |
| 11 LTS |
11.90.205 |
Jan 2032 |
Active |
| 12 (STS) |
12.3.11 |
Sep 30, 2019 |
EOL |
| 13 (MTS) |
13.54.17 |
Mar 31, 2023 |
EOL |
What does Azul Zulu 21 end of life mean?
When Azul Zulu 21 reaches end of life, the maintainers stop issuing security patches for this version except under Azul Platform Core (paid), until Sep 2033. 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: A CVE-based scan does not show the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Some scanners flag unsupported versions of common products, but coverage varies, and none of them give you the date in advance. Running Azul Zulu 21 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Azul Zulu 25 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Azul Zulu 21 reach end of life?
Azul Zulu 21 reaches end of life in September 2031. The vendor publishes the month only, not a day.
Is Azul Zulu 21 still supported?
Yes, Azul Zulu 21 is currently supported. The EOL date is September 2031.
What should I upgrade to from Azul Zulu 21?
The recommended upgrade from Azul Zulu 21 is
Azul Zulu 25 — the latest actively supported version. Check the
Azul Zulu full timeline for all supported versions.
What are the security risks of running Azul Zulu 21 past EOL?
When Azul Zulu 21 reaches end of life, the maintainers stop issuing security patches except under Azul Platform Core (paid), until Sep 2033. Any CVEs disclosed after the EOL date accumulate with no vendor fix. A CVE-based scan does not show this — it is the CVE blind spot; some scanners flag unsupported versions of common products, but coverage varies and none give the date in advance. Organizations running EOL Azul Zulu should migrate immediately or implement compensating controls.