CVE-2021-33820: UI Camera g3 Flex Firmware

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

An issue was discovered in UniFi Protect G3 FLEX Camera Version UVC.v4.30.0.67.Attacker could send a huge amount of TCP SYN packet to make web service's resource exhausted. Then the web server is denial-of-service.

Affected products

• UI Camera g3 Flex Firmware: version uvc.v4.30.0.67 only

Published 2021-06-18. Last modified 2026-06-17.