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CVE-2026-34909

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CVE-2026-34909

Published: May 22, 2026

Modified: May 22, 2026

PUBLISHED

CVSS v3.1

10.0

CRITICAL

Description

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.

VendorProductVersions

Ubiquiti Inc

UniFi OS Server

affected
0 - < 5.0.8

Ubiquiti Inc

Express

affected
0 - < 4.0.14

Ubiquiti Inc

UDM

affected
0 - < 5.1.12

Ubiquiti Inc

UDM-Pro

affected
0 - < 5.1.12

Ubiquiti Inc

UDM-SE

affected
0 - < 5.1.12

Ubiquiti Inc

UDM-Pro-Max

affected
0 - < 5.1.12

Ubiquiti Inc

UDM-Beast

affected
0 - < 5.1.11

Ubiquiti Inc

EFG

affected
0 - < 5.1.12

Ubiquiti Inc

UDW

affected
0 - < 5.1.12

Ubiquiti Inc

UDR

affected
0 - < 5.1.12

Ubiquiti Inc

UDR7

affected
0 - < 5.1.12

Ubiquiti Inc

UDR-5G

affected
0 - < 5.1.12

Ubiquiti Inc

Express 7

affected
0 - < 5.1.12

Ubiquiti Inc

UNVR

affected
0 - < 5.1.12

Ubiquiti Inc

UNVR-Pro

affected
0 - < 5.1.12

Ubiquiti Inc

UNVR-Instant

affected
0 - < 5.1.12

Ubiquiti Inc

UNVR-G2

affected
0 - < 5.1.12

Ubiquiti Inc

UNVR-G2-Pro

affected
0 - < 5.1.12

Ubiquiti Inc

ENVR

affected
0 - < 5.1.12

Ubiquiti Inc

ENVR-Core

affected
0 - < 5.1.12

Ubiquiti Inc

UNAS-2

affected
0 - < 5.1.10

Ubiquiti Inc

UNAS-4

affected
0 - < 5.1.10

Ubiquiti Inc

UNAS-Pro

affected
0 - < 5.1.10

Ubiquiti Inc

UNAS-Pro-4

affected
0 - < 5.1.10

Ubiquiti Inc

UNAS-Pro-8

affected
0 - < 5.1.10

Ubiquiti Inc

UCKP

affected
0 - < 5.1.12

Ubiquiti Inc

UCK

affected
0 - < 5.1.12

Ubiquiti Inc

UCK-Enterprise

affected
0 - < 5.1.12

Ubiquiti Inc

UCG-Ultra

affected
0 - < 5.1.12

Ubiquiti Inc

UCG-Max

affected
0 - < 5.1.12

Ubiquiti Inc

UCG-Fiber

affected
0 - < 5.1.12

Ubiquiti Inc

UCG-Industrial

affected
0 - < 5.1.12

Weaknesses (CWE)

CWE-22

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

References

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