CVE-2026-54406: A malicious actor with access to the network and high privileges could exploit a Path Traversal vulnerability

Q: How do I fix CVE-2026-54406?

unifi network application: upgrade to 10.4.57. Exact commands for each OS are on this page.

Q: Is CVE-2026-54406 being exploited?

CVE-2026-54406 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-54406 affect?

CVE-2026-54406 affects unifi network application. Severity is high (CVSS 8.7). 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.

This month

HIGH 8.7UPGRADE

CVE-2026-54406 is a high-severity flaw (CVSS 8.7) affecting unifi network application. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-07-02
Last modified	2026-10-25

Publisher (CNA): HackerOne · Vendor: ui

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-02 15:17 UTCPublished CVE record published
2026-10-25 21:10 UTCUpdated Record last modified

ui unifi network application UPGRADE

Affected: < 10.4.57

Fixed in: 10.4.57

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy unifi-network-application || rpm -q unifi-network-application || unifi-network-application --version

2. UPGRADE to 10.4.57 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade unifi-network-application

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade unifi-network-application

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-54406?

unifi network application: upgrade to 10.4.57. Exact commands for each OS are on this page.

Is CVE-2026-54406 being exploited?

CVE-2026-54406 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-54406 affect?

CVE-2026-54406 affects unifi network application. Severity is high (CVSS 8.7). 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 urgent is CVE-2026-54406?

Priority 42/100. High severity

Software pages

Ubiquiti vulnerabilities

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References

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