# CVE-2026-34909: Ubiquiti UniFi OS Path Traversal Vulnerability

> CVE-2026-34909: Ubiquiti UniFi OS Path Traversal Vulnerability. CVSS 10.0 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2026-34909
Last updated: 2026-07-23T16:10:00Z

- Published: 2026-05-22 00:43 UTC · Updated: 2026-07-23 16:10 UTC · Assigner: hackerone
- CVSS: 10.0 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS: 68.0%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-06-23, federal due date 2026-06-26, ransomware use: Unknown
- CWE: CWE-22

## Description

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 required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

## Affected vendors and products

- Ubiquiti Inc: EFG
- Ubiquiti Inc: ENVR
- Ubiquiti Inc: ENVR-Core
- Ubiquiti Inc: Express
- Ubiquiti Inc: Express 7
- Ubiquiti Inc: UCG-Fiber
- Ubiquiti Inc: UCG-Industrial
- Ubiquiti Inc: UCG-Max
- Ubiquiti Inc: UCG-Ultra
- Ubiquiti Inc: UCK
- Ubiquiti Inc: UCK-Enterprise
- Ubiquiti Inc: UCKP
- Ubiquiti Inc: UDM
- Ubiquiti Inc: UDM-Beast
- Ubiquiti Inc: UDM-Pro
- Ubiquiti Inc: UDM-Pro-Max
- Ubiquiti Inc: UDM-SE
- Ubiquiti Inc: UDR
- Ubiquiti Inc: UDR-5G
- Ubiquiti Inc: UDR7
- Ubiquiti Inc: UDW
- Ubiquiti Inc: UNAS-2
- Ubiquiti Inc: UNAS-4
- Ubiquiti Inc: UNAS-Pro
- Ubiquiti Inc: UNAS-Pro-4
- Ubiquiti Inc: UNAS-Pro-8
- Ubiquiti Inc: UniFi OS Server
- Ubiquiti Inc: UNVR
- Ubiquiti Inc: UNVR-G2
- Ubiquiti Inc: UNVR-G2-Pro
- Ubiquiti Inc: UNVR-Instant
- Ubiquiti Inc: UNVR-Pro

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-34909)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-34909)
- [https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b](https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-34909 · Markdown: https://rewindex.com/cve/CVE-2026-34909.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-34909 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:50:29.055Z