Path Traversal in Ubiquiti Inc Cloud Gateways
CVE-2026-54403
A malicious actor with access to the network could exploit a Path Traversal vulnerability found in certain devices running UniFi OS to bypass authentication of such UniFi OS devices or instances.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (54.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Ubiquiti Inc Cloud Gateways — versions 0
- Ubiquiti Inc Cloud Keys — versions 0
- Ubiquiti Inc Dream Machines — versions 0
- Ubiquiti Inc Dream Routers — versions 0
- Ubiquiti Inc Dream Wall — versions 0
- Ubiquiti Inc Enterprise Firewall Core — versions 0
- Ubiquiti Inc Enterprise Fortress Gateway — versions 0
- Ubiquiti Inc Enterprise Video Recorders — versions 0
- Ubiquiti Inc Express 7 — versions 0
- Ubiquiti Inc Network Attached Storage — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-54403?
- CVE-2026-54403 is a high-severity vulnerability in Ubiquiti Inc Cloud Gateways, classified under Path Traversal. CVSS score: 8.6/10. Published 2026-07-02.
- How severe is CVE-2026-54403?
- High severity. CVSS v3 base score is 8.6 out of 10.