Vulnerability in Ubiquiti Inc Cloud Gateways
CVE-2026-77534
A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (38.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.005 · change: +0.002
Affected products
- Ubiquiti Inc Cloud Gateways
- Ubiquiti Inc Cloud Keys
- Ubiquiti Inc Dream Machines
- Ubiquiti Inc Dream Routers
- Ubiquiti Inc Dream Wall
- Ubiquiti Inc Enterprise Firewall Core
- Ubiquiti Inc Enterprise Fortress Gateway
- Ubiquiti Inc Enterprise Network Attached Storage
- Ubiquiti Inc Enterprise Network Video Recorders
- Ubiquiti Inc Express 7
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-77534?
- CVE-2026-77534 is a critical-severity vulnerability in Ubiquiti Inc Cloud Gateways, classified under Improper Access Control. CVSS score: 9.9/10. Published 2026-08-26.
- How severe is CVE-2026-77534?
- Critical severity. CVSS v3 base score is 9.9 out of 10.