This article provides details on the situation encountered where the Junos OS version 23.4R3-S6.6 was no longer available in the Juniper download portal. This version had been previously accessible and in use, but at some point it was removed and replaced by a newer release, 23.4R3-S6.10.
Junos: 23.4R2-S6.6 no longer available
TSB104284 [juniper.net]
EX4400 images have been recalled for the following issue.
Please discard EX4400 images that you have downloaded before November 26, 2025.
The new images were posted on the download site on November 26, 2025. The replacement software images have the designation of "...ex-x86-64-23.4R2-S6.10..."
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