CVE-2026-34911

Severity: high (CVSS 7.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-22 · updated 2026-07-23
Weakness: CWE-22

Description

A malicious actor with access to the network and low privileges could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to obtain sensitive information.

Affected products

Ui Enterprise Fortress Gateway Firmware: before 5.1.12 — fixed in 5.1.12
Ui Enterprise Network Video Recorder Core Firmware: before 5.1.12 — fixed in 5.1.12
Ui Enterprise Network Video Recorder Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unas 2 Firmware: before 5.1.10 — fixed in 5.1.10
Ui Unas 4 Firmware: before 5.1.10 — fixed in 5.1.10
Ui Unas Pro 4 Firmware: before 5.1.10 — fixed in 5.1.10
Ui Unas Pro 8 Firmware: before 5.1.10 — fixed in 5.1.10
Ui Unas Pro Firmware: before 5.1.10 — fixed in 5.1.10
Ui Unifi Cloud Gateway Fiber Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Cloud Gateway Industrial Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Cloud Gateway Max Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Cloud Gateway Ultra Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Cloud Key Plus Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Cloudkey Enterprise Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Cloudkey Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Dream Machine Beast Firmware: before 5.1.11 — fixed in 5.1.11
Ui Unifi Dream Machine Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Dream Machine Pro Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Dream Machine Pro Max Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Dream Machine Special Edition Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Dream Router 5G Max Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Dream Router 7 Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Dream Router Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Dream Wall Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Express 7 Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Network Video Recorder Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Network Video Recorder G2 Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Network Video Recorder G2 Pro Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Network Video Recorder Instant Firmware: before 5.1.12 — fixed in 5.1.12
Ui Unifi Network Video Recorder Pro Firmware: before 5.1.12 — fixed in 5.1.12

How to fix

Upgrade to a fixed version: Ui Enterprise Fortress Gateway Firmware 5.1.12; Ui Enterprise Network Video Recorder Core Firmware 5.1.12; Ui Enterprise Network Video Recorder Firmware 5.1.12; Ui Unas 2 Firmware 5.1.10; Ui Unas 4 Firmware 5.1.10; Ui Unas Pro 4 Firmware 5.1.10; Ui Unas Pro 8 Firmware 5.1.10; Ui Unas Pro Firmware 5.1.10; Ui Unifi Cloud Gateway Fiber Firmware 5.1.12; Ui Unifi Cloud Gateway Industrial Firmware 5.1.12; Ui Unifi Cloud Gateway Max Firmware 5.1.12; Ui Unifi Cloud Gateway Ultra Firmware 5.1.12. Check the vendor advisory for mitigations.

References

https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b

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