CVE-2025-52665: UI UniFi Access

Critical severity, CVSS 10.0. EPSS: 41.1% chance of exploitation in the next 30 days.

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.

Affected products

• UI UniFi Access: from 3.3.22, before 4.0.21 (fixed in 4.0.21)

Published 2025-10-31. Last modified 2026-06-17.