Auth bypass in Ubiquiti Inc Unifi Access Application

CVE-2025-52665

A malicious actor with access to the management network could exploit a misconfiguration in UniFi’s door access application, UniFi Access, that exposed a management API without proper authentication. This vulnerability was introduced in Version 3.3.22 and was fixed in Version 4.0.21 and later.  Affected Products: UniFi Access Application (Version 3.3.22 through 3.4.31). 
 Mitigation: Update your UniFi Access Application to Version 4.0.21 or later.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.410 (98.6th percentile), scored .

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-52665: held from 0.410 to 0.410.

EPSS over last 30 days · oldest: 0.410 · newest: 0.410 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-52665?
CVE-2025-52665 is a critical-severity vulnerability in Ubiquiti Inc Unifi Access Application, classified under Missing Authentication for Critical Function. CVSS score: 10.0/10. Published 2025-10-31.
How severe is CVE-2025-52665?
Critical severity. CVSS v3 base score is 10.0 out of 10.