CVE-2026-54403
Ubiquiti UniFi OS Path Traversal Authentication Bypass
Description
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.
INFO
Published Date :
July 2, 2026, 3:17 p.m.
Last Modified :
July 10, 2026, 2:46 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-54403
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update UniFi OS to the latest secure version.
- Apply vendor security patches immediately.
- Restrict network access to UniFi OS devices.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-54403.
| URL | Resource |
|---|---|
| https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-54403 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-54403
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-54403 vulnerability anywhere in the article.
-
The Cyber Express
Ubiquiti Fixes Critical CVE-2026-50746 and Multiple UniFi OS Vulnerability Flaws
Ubiquiti has released security updates to address several critical security flaws, led by CVE-2026-50746, a maximum-severity UniFi OS vulnerability with a CVSS score of 10.0. Published in Security Adv ... Read more
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security.nl
Ubiquiti waarschuwt voor UniFi-lekken waardoor apparaten zijn over te nemen
Netwerkfabrikant Ubiquiti waarschuwt voor meerdere kritieke UniFi-lekken waardoor apparaten door aanvallers op afstand over zijn te nemen. In totaal is Ubiquiti met updates voor 25 verschillende kwets ... Read more
The following table lists the changes that have been made to the
CVE-2026-54403 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jul. 10, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:ui:unifi_os_server:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_dream_machine_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_dream_machine:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_dream_machine_pro_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_dream_machine_pro:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_dream_machine_special_edition_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_dream_machine_special_edition:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_dream_machine_pro_max_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_dream_machine_pro_max:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_dream_machine_beast_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_dream_machine_beast:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:enterprise_fortress_gateway_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:enterprise_fortress_gateway:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_dream_router_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_dream_router:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_dream_wall_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_dream_wall:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_dream_router_7_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_dream_router_7:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_express_7_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_express_7:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_cloudkey_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_cloudkey:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_cloud_key_plus_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_cloud_key_plus:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_cloudkey_enterprise_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_cloudkey_enterprise:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_network_video_recorder_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_network_video_recorder:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_network_video_recorder_pro_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_network_video_recorder_pro:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_network_video_recorder_instant_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_network_video_recorder_instant:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:enterprise_network_video_recorder_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:enterprise_network_video_recorder:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:enterprise_network_video_recorder_core_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:enterprise_network_video_recorder_core:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_network_video_recorder_g2_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_network_video_recorder_g2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_network_video_recorder_g2_pro_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_network_video_recorder_g2_pro:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_cloud_gateway_ultra_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_cloud_gateway_ultra:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_cloud_gateway_max_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_cloud_gateway_max:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_cloud_gateway_industrial_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_cloud_gateway_industrial:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_cloud_gateway_fiber_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_cloud_gateway_fiber:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unas_2_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.16 OR cpe:2.3:h:ui:unas_2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unas_4_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.16 OR cpe:2.3:h:ui:unas_4:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unas_pro_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.16 OR cpe:2.3:h:ui:unas_pro:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unas_pro_4_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.16 OR cpe:2.3:h:ui:unas_pro_4:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unas_pro_8_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.16 OR cpe:2.3:h:ui:unas_pro_8:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:enterprise_firewall_core_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.18 OR cpe:2.3:h:ui:enterprise_firewall_core:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:ui:unifi_dream_router_5g_max_firmware:*:*:*:*:*:*:*:* versions up to (including) 5.1.15 OR cpe:2.3:h:ui:unifi_dream_router_5g_max:-:*:*:*:*:*:*:* Added Reference Type HackerOne: https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 02, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-54403', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-02T16:09:36.129029Z'} -
New CVE Received by [email protected]
Jul. 02, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Ubiquiti Inc', 'product': 'UniFi OS Server', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Ubiquiti Inc', 'product': 'Dream Machines', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Ubiquiti Inc', 'product': 'Enterprise Fortress Gateway', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Ubiquiti Inc', 'product': 'Dream Wall', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Ubiquiti Inc', 'product': 'Dream Routers', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Ubiquiti Inc', 'product': 'Express 7', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Ubiquiti Inc', 'product': 'Cloud Keys', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Ubiquiti Inc', 'product': 'Network Video Recorders', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Ubiquiti Inc', 'product': 'Enterprise Video Recorders', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Ubiquiti Inc', 'product': 'Cloud Gateways', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Ubiquiti Inc', 'product': 'Network Attached Storage', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Ubiquiti Inc', 'product': 'Enterprise Firewall Core', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.1.19', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Added CWE CWE-22 Added Reference https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc