Vulnerability Report

CVE-2026-54403

Title: Path Traversal for Authentication Bypass in UniFi OS

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2026-54403.

CWE Category CWE-22

Published Date Jul 02, 2026

Modified Date Jul 10, 2026

Exploit Status Not Found

Score 8.6 CVSS v3.1

Exploit Probability (EPSS)

0.62%

Vulnerability Summary

CVE-2026-54403: A malicious actor with access to the network could exploit a Path Traversal vulnerability found in certain devices running UniFi OS to bypass authentication of such UniFi OS devices or instances.

Impacted Vendors

ui 32

Reference Links

https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc

CVSS v3.1

Source Entity [email protected]

Severity HIGH

8.6

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

CHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-54403 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

July 10, 2026 MODIFIED

Vulnerability data updated via NVD.

July 02, 2026 MODIFIED

Vulnerability data updated via NVD.

July 02, 2026 MODIFIED

Vulnerability data updated via NVD.

July 02, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.