What is CVE-2026-21633?

CVE-2026-21633 is a high-severity vulnerability in Ubiquiti Inc Unifi Protect Application, classified under Improper Authentication. CVSS score: 8.8/10. Published 2026-01-05.

How severe is CVE-2026-21633?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Ubiquiti Inc Unifi Protect Application

CVE-2026-21633

A malicious actor with access to the adjacent network could obtain unauthorized access to a UniFi Protect Camera by exploiting a discovery protocol vulnerability in the Unifi Protect Application (Version 6.1.79 and earlier). Affect…

Vulnerability class: Broken Authentication

EPSS: 0.004 (32.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ubiquiti Inc Unifi Protect Application — versions 6.1.79
Ui Unifi_protect

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

support@hackerone.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-21633?: CVE-2026-21633 is a high-severity vulnerability in Ubiquiti Inc Unifi Protect Application, classified under Improper Authentication. CVSS score: 8.8/10. Published 2026-01-05.
How severe is CVE-2026-21633?: High severity. CVSS v3 base score is 8.8 out of 10.