Arista EOS 4.28.x
EOS-4.28
Os Release
· EOS Series
Is Arista EOS 4.28.x still maintained?
No. Arista no longer maintains Arista EOS 4.28.x; support ended 2025-04-18. It receives no fixes of any kind, including security patches. Devices running it are unpatched against any newer vulnerability — plan an upgrade to a maintained release. See Arista's lifecycle bulletin.
When do security fixes for Arista EOS 4.28.x stop?
Arista has not published an end-of-engineering date for Arista EOS 4.28.x.
What should I upgrade Arista EOS 4.28.x to?
Upgrade to a currently maintained Arista release. Check the release-train table on the vendor page for the nearest supported version.
What known-exploited CVEs apply to the Arista EOS 4.28.x past end of support?
1 CVE in CISA's Known Exploited Vulnerabilities catalog affect Arista Arista. Because Arista EOS 4.28.x is past end of engineering, it will not receive fixes for them — a device left on this release is exploitable with no patch available. Upgrade to a maintained release. See the Known Exploited Vulnerabilities table below for the full list.
Known Exploited Vulnerabilities
This device is past Arista's security-support date. 1 CVE in CISA's Known Exploited Vulnerabilities catalog apply to the platform it runs. Arista is not issuing patches for this model. Isolate, compensate, or refresh.
| CVE | KEV added | Vulnerability | Flags |
|---|---|---|---|
CVE-2026-7473
|
Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability |
Source: CISA Known Exploited Vulnerabilities catalog. The Ransomware flag reflects CISA's own knownRansomwareCampaignUse field, set when the CVE has been observed in ransomware campaigns per their threat intel. It's not a property of the vulnerability description itself.
Correlation is at the platform level, not per-OS-version. Not exhaustive: KEV only lists actively-exploited CVEs and many relevant unexploited vulnerabilities are not here. Verify against vendor security advisories (PSIRT, JSA, PAN-SA) and NVD before acting. See compensating controls if refresh isn't immediate.
Arista EOS 4.28.x Release Lifecycle
Arista EOS 4.28.x is a Arista EOS software release. Releases are maintained on a fixed schedule: Arista ships fixes and security patches until the release reaches end of engineering, after which a device must be upgraded to a maintained release to stay patchable. The dates below are milestones for the software train, not for any specific appliance — hardware running this release has its own separate lifecycle. This product has reached end of life as of , meaning Arista no longer provides technical support, software updates, or hardware replacement for this product. Organizations still running the Arista EOS 4.28.x should plan a migration .
Lifecycle Milestones
| Lifecycle notice published | 4y 6mo ago | |
|---|---|---|
| Last date of support | 1y 6mo ago |
Additional Dates
| General Availability Date | 4y 6mo ago | |
|---|---|---|
| Seed Transcribed At | 5 days ago |