CYBERSIXT Signal Over Noise
All CVEs
Vulnerability intelligence

CVE-2026-34909

Ubiquiti UniFi OS Path Traversal Vulnerability

Ubiquiti UniFi OS CWE-22

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.

CVSS Score
10
Critical
EPSS — Exploit Probability
65%
Riskier than 99% of all CVEs · checked 2026-09-21
Exploitation
Confirmed in the wild
KEV since 2026-06-23
Remediation
unknown
Federal deadline 2026-06-26
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. Deadline for federal agencies: 2026-06-26.

NVD entry PoC / advisory CISA KEV

8 articles across 4 outlets · first covered Jun 23, 2026 · latest Jun 24, 2026

Coverage timeline

Related CVEs — Ubiquiti

CVE-2026-34910KEV CVE-2026-34908KEV