What is CVE-2026-54400?

CVE-2026-54400 is a critical-severity vulnerability in Ubiquiti Inc Unifi Access Application, classified under Improper Access Control. CVSS score: 9.1/10. Published 2026-07-02.

How severe is CVE-2026-54400?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Ubiquiti Inc Unifi Access Application

CVE-2026-54400

A malicious actor with access to the network and high privileges could exploit an Improper Access Control vulnerability found in UniFi Access Application to escalate privileges on the host device.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Ubiquiti Inc Unifi Access Application — versions 0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

support@hackerone.com

Frequently asked questions

What is CVE-2026-54400?: CVE-2026-54400 is a critical-severity vulnerability in Ubiquiti Inc Unifi Access Application, classified under Improper Access Control. CVSS score: 9.1/10. Published 2026-07-02.
How severe is CVE-2026-54400?: Critical severity. CVSS v3 base score is 9.1 out of 10.