What’s Vulnerable › Vulnerabilities

CVE-2026-77553

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-26 · updated 2026-08-28
• Weakness: CWE-284

Description

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

Affected products

• Ubiquiti Inc UniFi Access Application: before 4.3.5 — fixed in 4.3.5

How to fix

Upgrade to a fixed version: Ubiquiti Inc UniFi Access Application 4.3.5. Check the vendor advisory for mitigations.

References

• https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9

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