A malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CORS) misconfiguration found in UniFi OS to trigger actions in UniFi OS using that user's session.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00181.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Ubiquiti Inc UniFi OS Server unaffected
Version Status Constraints
0 affected < 5.1.19
Ubiquiti Inc Dream Machines unaffected
Version Status Constraints
0 affected < 5.1.19
Ubiquiti Inc Enterprise Fortress Gateway unaffected
Version Status Constraints
0 affected < 5.1.19
Ubiquiti Inc Dream Wall unaffected
Version Status Constraints
0 affected < 5.1.19
Ubiquiti Inc Dream Routers unaffected
Version Status Constraints
0 affected < 5.1.19
Ubiquiti Inc Express 7 unaffected
Version Status Constraints
0 affected < 5.1.19
Ubiquiti Inc Cloud Keys unaffected
Version Status Constraints
0 affected < 5.1.19
Ubiquiti Inc Network Video Recorders unaffected
Version Status Constraints
0 affected < 5.1.19
Ubiquiti Inc Enterprise Video Recorders unaffected
Version Status Constraints
0 affected < 5.1.19
Ubiquiti Inc Cloud Gateways unaffected
Version Status Constraints
0 affected < 5.1.19
Ubiquiti Inc Network Attached Storage unaffected
Version Status Constraints
0 affected < 5.1.19
Ubiquiti Inc Enterprise Firewall Core unaffected
Version Status Constraints
0 affected < 5.1.19

No data.

No data.

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No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc cve-icon
History

Fri, 03 Jul 2026 10:45:00 +0000

Type Values Removed Values Added
Title CORS Misconfiguration Enables Authenticated Session Abuse in UniFi OS

Thu, 02 Jul 2026 23:45:00 +0000

Type Values Removed Values Added
Title CORS Misconfiguration Enables Authenticated Session Abuse in UniFi OS

Thu, 02 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 02 Jul 2026 15:15:00 +0000

Type Values Removed Values Added
Description A malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CORS) misconfiguration found in UniFi OS to trigger actions in UniFi OS using that user's session.
Weaknesses CWE-942
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2026-07-02T15:52:20.711Z

Reserved: 2026-06-16T15:00:01.614Z

Link: CVE-2026-55110

cve-icon Vulnrichment

Updated: 2026-07-02T15:41:36.930Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-03T10:30:11Z

Weaknesses