CVE-2026-54402

FAUCET Score

A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device.

First published: Jul 2, 2026Last modified: Jul 2, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		<= 5.1.15CPE matchmatch criteria	cpe:2.3:a:ui:unifi_os_server::::::::
		<= 5.1.15CPE matchmatch criteria	cpe:2.3:o:ui:unifi_dream_machine_firmware::::::::
		<= 5.1.15CPE matchmatch criteria	cpe:2.3:o:ui:unifi_dream_machine_pro_firmware::::::::
		<= 5.1.15CPE matchmatch criteria	cpe:2.3:o:ui:unifi_dream_machine_special_edition_firmware::::::::
		<= 5.1.15CPE matchmatch criteria	cpe:2.3:o:ui:unifi_dream_machine_pro_max_firmware::::::::

CVSS Data

CVSS version used by this source: 3.1

9.9CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

3.1

Impact Score

6.0

CvssVersion

3.1

Exploit Intelligence

EPSS Score

1.18%

Probability of exploitation in next 30 days

EPSS Percentile

64.5%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0118 is in the 61st percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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

Vendor Advisory