Vulnerability Intelligence Report
Ubiquiti UniFi OS Path Traversal Vulnerability
CVE-2026-34909
A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to access an underlying account.
CISA KEV
SSVC: Active Exploitation
Automatable
CVSS Base Score
10.0
CRITICAL
Exploitability:3.9
Impact Score:6.1
EPSS Probability:1.82%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-22 ↗CWE-22 Path Traversal
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Ubiquiti Inc | UniFi OS Server | 0 < 5.0.8 (affected) |
| Ubiquiti Inc | Express | 0 < 4.0.14 (affected) |
| Ubiquiti Inc | UDM | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UDM-Pro | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UDM-SE | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UDM-Pro-Max | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UDM-Beast | 0 < 5.1.11 (affected) |
| Ubiquiti Inc | EFG | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UDW | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UDR | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UDR7 | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UDR-5G | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | Express 7 | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UNVR | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UNVR-Pro | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UNVR-Instant | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UNVR-G2 | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UNVR-G2-Pro | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | ENVR | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | ENVR-Core | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UNAS-2 | 0 < 5.1.10 (affected) |
| Ubiquiti Inc | UNAS-4 | 0 < 5.1.10 (affected) |
| Ubiquiti Inc | UNAS-Pro | 0 < 5.1.10 (affected) |
| Ubiquiti Inc | UNAS-Pro-4 | 0 < 5.1.10 (affected) |
| Ubiquiti Inc | UNAS-Pro-8 | 0 < 5.1.10 (affected) |
| Ubiquiti Inc | UCKP | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UCK | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UCK-Enterprise | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UCG-Ultra | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UCG-Max | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UCG-Fiber | 0 < 5.1.12 (affected) |
| Ubiquiti Inc | UCG-Industrial | 0 < 5.1.12 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | HackerOne · Bug Bounty Provider · USA |
| Reserved | 2026-03-31T15:00:06 |
| Published | 2026-05-22T00:43:49 |
| Last Updated | 2026-06-24T03:56:19 |
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