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.

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

EPSS: 0.410 (98.5th percentile) — read the EPSS interpretation.

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.

Affected products

Ubiquiti Inc Unifi Access Application — versions 3.3.22
Ui Unifi_access

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

support@hackerone.com (Vendor Advisory)

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.