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Findings

CVE-2026-34909

Ubiquiti UniFi OS Path Traversal Vulnerability

Published May 21, 2026 · updated Jul 23, 2026 · Ubiquiti UniFi OS

Ubiquiti UniFi OS contains a path traversal vulnerability which could allow a malicious actor with access to the network to access files on the underlying system that could be manipulated to access an underlying account.

Timeline

Detection, updates, and resolution for this record.

  1. May 21, 2026 · Catalog

    Detected

    Ubiquiti UniFi OS contains a path traversal vulnerability which could allow a malicious actor with access to the network to access files on the underlying system that could be manipulated to access an underlying account.

  2. Jun 23, 2026 · CISA KEV

    Known exploited

    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

  3. Jun 26, 2026 · CISA KEV

    Remediation due

    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

  4. Jul 23, 2026 · Catalog

    Updated

    Ubiquiti UniFi OS contains a path traversal vulnerability which could allow a malicious actor with access to the network to access files on the underlying system that could be manipulated to access an underlying account.

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.

CISA due date Jun 26, 2026

Affected

  • cpe ui/enterprise fortress gateway firmwareversion unspecified
  • cpe ui/unifi cloud gateway industrial firmwareversion unspecified
  • cpe ui/unifi dream machine firmwareversion unspecified
  • cpe ui/unifi dream machine pro firmwareversion unspecified
  • cpe ui/unifi dream machine pro max firmwareversion unspecified
  • cpe ui/unifi dream machine special edition firmwareversion unspecified
  • cpe ui/unifi dream router 7 firmwareversion unspecified
  • cpe ui/unifi dream router firmwareversion unspecified
  • cpe ui/unifi dream wall firmwareversion unspecified
  • cpe ui/unifi express 7 firmwareversion unspecified
  • cpe ui/unifi network video recorder firmwareversion unspecified
  • cpe ui/unifi os serverversion unspecified
  • vendor Ubiquiti UniFi OSversion unspecified

Sources

  • CISA KEVCVE-2026-34909

    Ubiquiti UniFi OS contains a path traversal vulnerability which could allow a malicious actor with access to the network to access files on the underlying system that could be manipulated to access an underlying account.

    cisa.gov
  • CVE.orgCVE-2026-34909

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2026-34909

    30-day exploitation probability 1.8%

    first.org
  • NIST NVDCVE-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.

    nvd.nist.gov

References