Vulnerability · Published Jul 2, 2026 · Assigned by hackerone
CVE-2026-55110
High 7.5
In plain English
A high-severity security flaw in Cloud Gateways from Ubiquiti Inc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 80.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Ubiquiti Inc | UniFi OS Server | 0 – before 5.1.19 |
| Ubiquiti Inc | Dream Machines | 0 – before 5.1.19 |
| Ubiquiti Inc | Enterprise Fortress Gateway | 0 – before 5.1.19 |
| Ubiquiti Inc | Dream Wall | 0 – before 5.1.19 |
| Ubiquiti Inc | Dream Routers | 0 – before 5.1.19 |
| Ubiquiti Inc | Express 7 | 0 – before 5.1.19 |
| Ubiquiti Inc | Cloud Keys | 0 – before 5.1.19 |
| Ubiquiti Inc | Network Video Recorders | 0 – before 5.1.19 |
| Ubiquiti Inc | Enterprise Video Recorders | 0 – before 5.1.19 |
| Ubiquiti Inc | Cloud Gateways | 0 – before 5.1.19 |
| Ubiquiti Inc | Network Attached Storage | 0 – before 5.1.19 |
| Ubiquiti Inc | Enterprise Firewall Core | 0 – before 5.1.19 |
Weakness: CWE-942 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H