CVE-2021-44530: UI UniFi Network Controller

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

An injection vulnerability exists in a third-party library used in UniFi Network Version 6.5.53 and earlier (Log4J CVE-2021-44228) allows a malicious actor to control the application.

Affected products

• UI UniFi Network Controller: up to and including 6.5.53

Published 2022-01-14. Last modified 2026-06-17.