UniFi OS Server 4.2.23 – Official Download Links
The moment we have been waiting for!
This version is outdated and affected by known security issues. Ubiquiti's Security Advisory Bulletin 067 (August 26, 2026) lists UniFi OS Server 5.1.21 and earlier. As of September 2026 the current version is 5.1.42. Download the current version from Ubiquiti →
On July 30, 2025, Ubiquiti announced UniFi OS Server, with version 4.2.23 as an Early Access build. The first general release was 4.3.6 on September 22, 2025.
The 4.2.23 installers are listed below for reference:
Windows
macOS
Linux
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