PT-2026-55238 · Ubiquiti · Cloud Gateways+11

Published 2026-07-02 · Updated 2026-07-02 · CVE-2026-54402

Positive Technologies (AI Summary)

CVSS v3.1

9.9

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions UniFi OS (affected versions not specified)

Description An improper input validation issue allows a malicious actor with network access and low privileges to perform command injection on the host device. Command injection is a flaw that allows an attacker to execute arbitrary operating system commands on the server.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2026-54402

Affected Products

Cloud Gateways

Cloud Keys

Dream Machines

Dream Routers

Dream Wall

Enterprise Firewall Core

Enterprise Fortress Gateway

Enterprise Video Recorders

Express 7

Network Attached Storage

Network Video Recorders

Unifi Os Server

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-54402 · Security Note
• https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc · Note
• https://reddit.com/r/pwnhub/comments/1uly3j6/a_malicious_actor_with_access_to_the_network_and · Reddit Post