Improper Access Control in UniFi OS Devices

Publication date: 2026-05-22

Last updated on: 2026-06-24

Assigner: HackerOne

Description

A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-05-22

Last Modified

2026-06-24

Generated

2026-07-02

AI Q&A

2026-05-22

EPSS Evaluated

2026-06-30

NVD

CVE-2026-34908

EUVD

EUVD-2026-31383

Affected Vendors & Products

Vendor	Product	Version / Range
ui	unifi_os_server	to 5.0.8 (exc)
ui	unifi_cloud_gateway_industrial_firmware	to 5.1.12 (exc)
ui	unifi_dream_machine_firmware	to 5.1.12 (exc)
ui	unifi_dream_machine_pro_firmware	to 5.1.12 (exc)
ui	unifi_dream_machine_special_edition_firmware	to 5.1.12 (exc)
ui	unifi_dream_machine_pro_max_firmware	to 5.1.12 (exc)
ui	enterprise_fortress_gateway_firmware	to 5.1.12 (exc)
ui	unifi_dream_wall_firmware	to 5.1.12 (exc)
ui	unifi_dream_router_firmware	to 5.1.12 (exc)
ui	unifi_dream_router_7_firmware	to 5.1.12 (exc)
ui	unifi_express_7_firmware	to 5.1.12 (exc)
ui	unifi_network_video_recorder_firmware	to 5.1.12 (exc)
ui	unifi_network_video_recorder_pro_firmware	to 5.1.12 (exc)
ui	unifi_network_video_recorder_instant_firmware	to 5.1.12 (exc)
ui	enterprise_network_video_recorder_firmware	to 5.1.12 (exc)
ui	unifi_cloud_gateway_ultra_firmware	to 5.1.12 (exc)
ui	unifi_cloud_gateway_max_firmware	to 5.1.12 (exc)
ui	unifi_cloud_gateway_fiber_firmware	to 5.1.12 (exc)
ui	unifi_dream_router_5g_max_firmware	to 5.1.12 (exc)
ui	enterprise_network_video_recorder_core_firmware	to 5.1.12 (exc)
ui	unifi_cloud_key_plus_firmware	to 5.1.12 (exc)
ui	unifi_cloudkey_firmware	to 5.1.12 (exc)
ui	unifi_cloudkey_enterprise_firmware	to 5.1.12 (exc)
ui	unifi_network_video_recorder_g2_firmware	to 5.1.12 (exc)
ui	unifi_network_video_recorder_g2_pro_firmware	to 5.1.12 (exc)
ui	unifi_dream_machine_beast_firmware	to 5.1.11 (exc)
ui	unas_2_firmware	to 5.1.10 (exc)
ui	unas_4_firmware	to 5.1.10 (exc)
ui	unas_pro_firmware	to 5.1.10 (exc)
ui	unas_pro_4_firmware	to 5.1.10 (exc)
ui	unas_pro_8_firmware	to 5.1.10 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This vulnerability is an Improper Access Control issue found in UniFi OS devices. It allows a malicious actor who has network access to make unauthorized changes to the system.

Impact Analysis

The vulnerability can have a severe impact as it allows an attacker to make unauthorized changes to the system without any privileges or user interaction. This can lead to complete compromise of the affected device, including full control over confidentiality, integrity, and availability.

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