CVE-2026-55116
UniFi OS Improper Access Control Vulnerability
Description
A malicious actor with access to the network and under certain network configurations could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to make unauthorized changes to such UniFi OS devices.
INFO
Published Date :
July 2, 2026, 3:17 p.m.
Last Modified :
July 9, 2026, 6:14 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Restrict network access to UniFi OS devices.
- Review and enforce proper access control settings.
- Apply vendor-specific security updates and patches.
- Monitor for unauthorized configuration changes.
Public PoC/Exploit Available at Github
CVE-2026-55116 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2026-55116.
| 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-2026-55116 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-2026-55116
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).
None
Python Jinja Batchfile Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-55116 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
-
The Hacker News
Ubiquiti Patches Critical UniFi Flaws Across Connect, Talk, Access, Protect, and OS
Ravie LakshmananJul 08, 2026Vulnerability / Network Security Ubiquiti has shipped updates to address multiple critical security flaws impacting UniFi Connect, UniFi Talk, UniFi Access, UniFi Protect ... Read more
The following table lists the changes that have been made to the
CVE-2026-55116 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.
-
Initial Analysis by [email protected]
Jul. 09, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE NVD-CWE-Other Added CPE Configuration OR *cpe:2.3:a:ui:unifi_connect:*:*:*:*:*:*:*:* versions up to (excluding) 3.4.20 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-2026-55116', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-02T15:41:23.595428Z'} -
New CVE Received by [email protected]
Jul. 02, 2026
Action Type Old Value New Value Added Affected [{'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 Gateways', '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 and under certain network configurations could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to make unauthorized changes to such UniFi OS devices. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-284 Added Reference https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc