What’s Vulnerable › Vulnerabilities

CVE-2026-77543

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% 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-20

Description

A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi Access Application to execute a Command Injection 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

Get alerted when CVE-2026-77543 or the next vulnerability affects your stack