Critical severity9.1NVD Advisory· Published Jul 2, 2026· Updated Aug 17, 2026

CVE-2026-54400

Description

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.

Affected products

UI/Unifi Access
cpe:2.3:a:ui:unifi_access:*:*:*:*:*:*:*:*
Range: <4.2.29
Unify/Access Applicationllm-create

Patches

Vulnerability mechanics

References

community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afcnvdVendor Advisory

News mentions

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cvss	0.591
epss	0.000
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ransomware	0.000