CVE-2026-55117: UI UniFi Access

High severity, CVSS 8.6. EPSS: 0.6% chance of exploitation in the next 30 days.

A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi Access Application to access files on the host device.

Affected products

• UI UniFi Access: before 4.2.29 (fixed in 4.2.29)

Published 2026-07-02. Last modified 2026-08-17.