CVE-2026-34909CRITICAL 10.0CISA KEVEPSS p99.1%

CVE-2026-34909Ubiquiti UniFi OS Path Traversal Vulnerability

Ubiquiti / UniFi OS

Description

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.

Scoring

CVSS 3.110.0 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS62.77% probability of exploitation · percentile 99.1% · 2026-08-02T12:03:13Z
Published2026-05-22
Last modified2026-07-23

CISA KEV entry

Added to KEV: 2026-06-23

Underlying weaknesses· 1

CWE-22

References

  1. https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b

1

TypeTargetConfidenceTier
WeaknessImproper Limitation of a Pathname to a Restricted Directory ('Path Traversal')cwe-220%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-22557
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Ubiquiti UniFi OS Improper Access Control Vulnerability
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Ubiquiti UniFi OS Improper Input Validation Vulnerability
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CVE-2026-22562
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CVE-2026-33000
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CVE-2025-23116
Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.