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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-54403

37
FAUCET Score

A malicious actor with access to the network could exploit a Path Traversal vulnerability found in certain devices running UniFi OS to bypass authentication of such UniFi OS devices or instances.

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

Impacted Technologies

VendorProductVersion(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

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.56%
Probability of exploitation in next 30 days
EPSS Percentile
43.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0056 is in the 20th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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