CVE-2026-50746 Tops List of Critical UniFi OS Vulnerability Patches
The most severe issue, CVE-2026-50746, affects UniFi Connect Application versions 3.4.16 and earlier. The software is used to manage commercial building operations, including smart LED lighting systems and electric vehicle chargers, from a centralized interface.
According to in UniFi OS; CVE-2026-55115, an SSRF vulnerability in UniFi Protect; and CVE-2026-55116, an improper access control issue that allowed unauthorized changes to affected devices. Each requires software updates to the latest supported releases.
The advisory also addresses several high-severity vulnerabilities, including CVE-2026-54401 (SSRF), CVE-2026-54403 (path traversal), CVE-2026-54404 ( to remove the requirement for low-privileged access, increasing its exploitation potential.
Affected products include UniFi OS Server, UDM, UDM-Pro, UDM-SE, UDM-Pro-Max, UDM-Beast, EFG, UDW, UDR, UDR7, UDR-5G, Express 7, Cloud Key devices, UNVR systems, ENVR platforms, UCG appliances, EF-Core, and multiple UNAS storage products running vulnerable software versions.
Ubiquiti advises customers to update UniFi OS devices to version 5.1.19 or later, where applicable, and to upgrade UniFi Talk to version 5.2.2, UniFi Access to version 4.2.29, UniFi Protect to version 7.1.83, and UniFi Network to version 10.4.57. Prompt installation of these updates is recommended to mitigate the risks associated with CVE-2026-50746 and the broader UniFi OS vulnerability disclosures.
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