CubePath
Sign Up

CVE-2026-34909

Improper Limitation of a Pathname to a Restricted Directory

CVSS 3.1 Critical 10.0Known exploited (CISA KEV)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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.

Official description from the CVE record, published by hackerone. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org

Key data

CVSS 3.1 Critical 10.0

Score published by hackerone in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

  • Attack vector: Network

    The vulnerable component can be reached over a network, possibly from the Internet.

  • Attack complexity: Low

    No special conditions are needed. The attack can be repeated at will.

  • Privileges required: None

    No account or privileges are needed.

  • User interaction: None

    No action from any user is needed.

  • Scope: Changed

    The impact can reach other components beyond the vulnerable one.

  • Confidentiality impact: High

    Serious or total effect on the secrecy of data.

  • Integrity impact: High

    Serious or total effect on the trustworthiness of data.

  • Availability impact: High

    Serious or total effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.
Score
0.69235 (69.2% probability)
Percentile
99.4%
Scores of
Nov 10, 2026
Model
v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.
Name in the catalog
Ubiquiti UniFi OS Path Traversal Vulnerability
Added to the catalog
Jun 23, 2026
Federal due date
Jun 26, 2026

CISA assessment as of Jun 23, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.
Exploitation
Recorded by CISA as active
Automatable
yes
Technical impact
total

Weakness (CWE)

CWE catalog version 5.0.
CWE names: Copyright © 2006-2026, The MITRE Corporation. See /security/cve/legal for the CWE license.
  • CWE-22Improper Limitation of a Pathname to a Restricted Directory

Affected products

Products listed in the CVE record, as the CNA published them.

  • Ubiquiti Inc UniFi OS Server

    • affected: before 5.0.8

  • Ubiquiti Inc Express

    • affected: before 4.0.14

  • Ubiquiti Inc UDM

    • affected: before 5.1.12

  • Ubiquiti Inc UDM-Pro

    • affected: before 5.1.12

  • Ubiquiti Inc UDM-SE

    • affected: before 5.1.12

  • Ubiquiti Inc UDM-Pro-Max

    • affected: before 5.1.12

  • Ubiquiti Inc UDM-Beast

    • affected: before 5.1.11

  • Ubiquiti Inc EFG

    • affected: before 5.1.12

  • Ubiquiti Inc UDW

    • affected: before 5.1.12

  • Ubiquiti Inc UDR

    • affected: before 5.1.12

  • Ubiquiti Inc UDR7

    • affected: before 5.1.12

  • Ubiquiti Inc UDR-5G

    • affected: before 5.1.12

  • Ubiquiti Inc Express 7

    • affected: before 5.1.12

  • Ubiquiti Inc UNVR

    • affected: before 5.1.12

  • Ubiquiti Inc UNVR-Pro

    • affected: before 5.1.12

  • Ubiquiti Inc UNVR-Instant

    • affected: before 5.1.12

  • Ubiquiti Inc UNVR-G2

    • affected: before 5.1.12

  • Ubiquiti Inc UNVR-G2-Pro

    • affected: before 5.1.12

  • Ubiquiti Inc ENVR

    • affected: before 5.1.12

  • Ubiquiti Inc ENVR-Core

    • affected: before 5.1.12

  • Ubiquiti Inc UNAS-2

    • affected: before 5.1.10

  • Ubiquiti Inc UNAS-4

    • affected: before 5.1.10

  • Ubiquiti Inc UNAS-Pro

    • affected: before 5.1.10

  • Ubiquiti Inc UNAS-Pro-4

    • affected: before 5.1.10

  • Ubiquiti Inc UNAS-Pro-8

    • affected: before 5.1.10

  • Ubiquiti Inc UCKP

    • affected: before 5.1.12

  • Ubiquiti Inc UCK

    • affected: before 5.1.12

  • Ubiquiti Inc UCK-Enterprise

    • affected: before 5.1.12

  • Ubiquiti Inc UCG-Ultra

    • affected: before 5.1.12

  • Ubiquiti Inc UCG-Max

    • affected: before 5.1.12

  • Ubiquiti Inc UCG-Fiber

    • affected: before 5.1.12

  • Ubiquiti Inc UCG-Industrial

    • affected: before 5.1.12

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

  1. ID reserved
  2. Record published
  3. Added to CISA KEV
  4. Record last updated

Look up another CVE

About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.
Cloud VPSDDoS protection

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:09 UTC. Sources and licenses