Detections
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Ubiquiti UniFi OS < 5.1.12 Multiple Vulnerabilities

critical Nessus Plugin ID 324968

Synopsis

A device on the remote host is affected by multiple vulnerabilities.

Description

According to its self-reported version, the remote Ubiquiti UniFi OS device is prior to 5.1.12. It is, therefore, affected by multiple vulnerabilities:

 - 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. (CVE-2026-34908)

 - A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to access an underlying account. (CVE-2026-34909)

 - A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. (CVE-2026-34910)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade Ubiquiti UniFi OS to version 5.1.12 or later.

See Also

http://www.nessus.org/u?7c0eaa8b

Plugin Details

Severity: Critical

ID: 324968

File Name: ubnt_unifi_os_5_1_12.nasl

Version: 1.1

Type: Remote

Family: Misc.

Published: 7/3/2026

Updated: 7/3/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.3

Percentile: 99.81

CVSS v2

Risk Factor: Critical

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-34908

CVSS v3

Risk Factor: Critical

Base Score: 10

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Vulnerability Information

CPE: x-cpe:/o:ubnt:unifi

Required KB Items: Host/UBNT_UniFi/Version

Patch Publication Date: 5/22/2026

Vulnerability Publication Date: 5/22/2026

CISA Known Exploited Vulnerability Due Dates: 6/26/2026

Reference Information

CVE: CVE-2026-34908, CVE-2026-34909, CVE-2026-34910

IAVA: 2026-A-0632