How severe is CVE-2026-54406?

CVE-2026-54406 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-54406 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-54406?

CVE-2026-54406 affects Ui Unifi Network Application. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-54406?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-54406 published?

CVE-2026-54406 was published on 2026-07-02 and last updated on 2026-07-06.

CVE-2026-54406

CVE-2026-54406 is a high-severity vulnerability in Ui Unifi Network Application with a CVSS 3.x base score of 8.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 8.7)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Ui Unifi Network Application
Published: 2026-07-02
Last modified: 2026-07-06

Description

A malicious actor with access to the network and high privileges could exploit a Path Traversal vulnerability found in self-hosted instances of UniFi Network Application to escalate write permission on the host device.

Frequently asked questions

What is CVE-2026-54406?: A malicious actor with access to the network and high privileges could exploit a Path Traversal vulnerability found in self-hosted instances of UniFi Network Application to escalate write permission on the host device.
How severe is CVE-2026-54406?: CVE-2026-54406 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-54406 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-54406?: CVE-2026-54406 affects Ui Unifi Network Application. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-54406?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-54406 published?: CVE-2026-54406 was published on 2026-07-02 and last updated on 2026-07-06.

References

https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc

Affected products (1)

cpe:2.3:a:ui:unifi_network_application:*:*:*:*:*:*:*:*

More vulnerabilities in Ui Unifi Network Application

CVE-2023-28365 — Critical (CVSS 9.1): A backup file vulnerability found in UniFi applications (Version 7.3.83 and earlier) running on Linux operating systems…
CVE-2026-55114 — High (CVSS 8.8): A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability…
CVE-2026-55118 — High (CVSS 8.3): A malicious actor with access to the network,low privileges and under certain conditions could exploit an Improper…
CVE-2024-42025 — High (CVSS 7.8): A Command Injection vulnerability found in a Self-Hosted UniFi Network Servers (Linux) with UniFi Network Application…
CVE-2026-56842 — High (CVSS 7.5): A malicious actor with access to the network and under certain conditions could exploit an Incorrect Authorization…
CVE-2026-54405 — High (CVSS 7.5): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi…

All CVEs affecting Ui Unifi Network Application →

Other CWE-22 (Path Traversal) vulnerabilities

CVE-2026-76606 — Critical (CVSS 10.0): Joomla Extension - fabrikar.com - Path Traversal via image element in Fabrik < 4.7.3 - ???.
CVE-2026-18051 — Critical (CVSS 10.0): The W3 Total Cache WordPress plugin before 2.10.5 does not properly validate the request path it uses to build cache…
CVE-2026-74764 — Critical (CVSS 10.0): Pandora contains a path traversal vulnerability in its TAR archive extraction functionality. When processing a…
CVE-2026-16940 — Critical (CVSS 10.0): The Custom Fields WordPress plugin before 1.5.1 does not validate a user-supplied file path before deletion, allowing…
CVE-2026-67429 — Critical (CVSS 10.0): Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.6, image.download and related…
CVE-2026-59555 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Deletion in Participants Database <= 2.7.8.3 versions.

Browse all CWE-22 (Path Traversal) vulnerabilities →