Vulnerability in Ubiquiti Inc Cloud Gateways
CVE-2026-77549
A malicious actor with access to the network and under certain conditions could exploit an Improper Neutralization of CRLF Sequences vulnerability found in certain devices running UniFi OS to bypass authentication to such UniFi OS devices or instances.
Vulnerability class: CRLF Injection
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (41.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · 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
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-77549?
- CVE-2026-77549 is a critical-severity vulnerability in Ubiquiti Inc Cloud Gateways, classified under CRLF Injection. CVSS score: 9.0/10. Published 2026-08-26.
- How severe is CVE-2026-77549?
- Critical severity. CVSS v3 base score is 9.0 out of 10.