Vulnerability · Published Jul 2, 2026 · Assigned by hackerone
CVE-2026-55116
Critical 9.0
In plain English
A critical-severity improper access control 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 0.4% (higher than 36% of all known vulnerabilities).
Severity (CVSS 3.1)9.0Critical
Exploit odds (30 days)0.4%top 64.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| 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 Gateways | 0 – before 5.1.19 |
| Ubiquiti Inc | Enterprise Firewall Core | 0 – before 5.1.19 |
Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H