Improper Authentication in UniFi Protect Application - CVE-2026-21633
Published: February 27, 2026
Vulnerability identifier: #VU123324
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-21633
CWE-ID: CWE-287
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Ubiquiti Networks
Affected software:
UniFi Protect Application
UniFi Protect Application
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to the lack of encryption in the communications channel within the discovery protocol. A remote attacker on the local network can bypass authentication process and gain unauthorized access to the application.
How to mitigate CVE-2026-21633
Install updates from vendor's website.