Juniper Junos OS 23.4 · Version Status
Juniper Junos OS 23.4 End of Life Date
Juniper Junos OS 23.4 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
✓
Juniper Junos OS 23.4 is actively supported. EOL date: June 26, 2029.
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EOL Date
Jun 26, 2029
1029 days remaining
Latest Release
23.4
Standard release
Release Date
Dec 26, 2023
Juniper Junos OS 23.4 series
Lifecycle detail
Juniper Junos OS 23.4 was released on December 26, 2023 and support is scheduled to end on June 26, 2029 — a planned supported lifespan of 5 years and 6 months, longer than the 3 years and 6 months median for Juniper Junos OS releases.
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 →
All Juniper Junos OS Versions
| Version | Latest | EOL Date | Status |
|---|
| 20.2 |
20.2 |
Dec 30, 2023 |
EOL |
| 20.3 |
20.3 |
Mar 29, 2023 |
EOL |
| 20.4 |
20.4 |
Jun 25, 2024 |
EOL |
| 21.1 |
21.1 |
Sep 25, 2023 |
EOL |
| 21.2 |
21.2 |
Dec 29, 2024 |
EOL |
| 21.3 |
21.3 |
Mar 23, 2024 |
EOL |
| 21.4 |
21.4 |
Jun 20, 2025 |
EOL |
| 22.1 |
22.1 |
Sep 24, 2024 |
EOL |
What does Juniper Junos OS 23.4 end of life mean?
When Juniper Junos OS 23.4 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 Juniper Junos OS 23.4 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Juniper Junos OS 26.2 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Juniper Junos OS 23.4 reach end of life?
Juniper Junos OS 23.4 reached end of life on June 26, 2029. That is 1029 days remaining.
Is Juniper Junos OS 23.4 still supported?
Yes, Juniper Junos OS 23.4 is currently supported. The EOL date is June 26, 2029.
What should I upgrade to from Juniper Junos OS 23.4?
The recommended upgrade from Juniper Junos OS 23.4 is
Juniper Junos OS 26.2 — the latest actively supported version. Check the
Juniper Junos OS full timeline for all supported versions.
What are the security risks of running Juniper Junos OS 23.4 past EOL?
When Juniper Junos OS 23.4 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 Juniper Junos OS should migrate immediately or implement compensating controls.