Vulnerability Intelligence Report
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.
No Active Exploit Signals
CVSS Base Score
9.0
CRITICAL
Exploitability:2.3
Impact Score:6.1
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-93 ↗CWE-93 Improper neutralization of CRLF sequences ('CRLF injection')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Ubiquiti Inc | UniFi OS Server | 0 < 5.1.37 (affected) |
| Ubiquiti Inc | Cloud Keys | 0 < 5.1.31 (affected) |
| Ubiquiti Inc | Network Video Recorders | 0 < 5.1.31 (affected) |
| Ubiquiti Inc | Enterprise Network Video Recorders | 0 < 5.1.31 (affected) |
| Ubiquiti Inc | Enterprise Network Attached Storage | 0 < 5.1.31 (affected) |
| Ubiquiti Inc | Dream Machines | 0 < 5.1.31 (affected) |
| Ubiquiti Inc | Enterprise Firewall Core | 0 < 5.1.31 (affected) |
| Ubiquiti Inc | Dream Routers | 0 < 5.1.31 (affected) |
| Ubiquiti Inc | Enterprise Fortress Gateway | 0 < 5.1.31 (affected) |
| Ubiquiti Inc | Cloud Gateways | 0 < 5.1.31 (affected) |
| Ubiquiti Inc | Dream Wall | 0 < 5.1.31 (affected) |
| Ubiquiti Inc | Express 7 | 0 < 5.1.31 (affected) |
| Ubiquiti Inc | Network Attached Storage | 0 < 5.1.32 (affected) |
| Ubiquiti Inc | Express | 0 < 4.0.17 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Ubiquiti, Inc. · Vendor · USA |
| Reserved | 2026-08-20T20:32:37 |
| Published | 2026-08-26T10:30:06 |
| Last Updated | 2026-08-27T03:56:37 |
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