CVE-2026-21634: UI UniFi Protect

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

A malicious actor with access to the adjacent network could overflow the UniFi Protect Application (Version 6.1.79 and earlier) discovery protocol causing it to restart. Affected Products: UniFi Protect Application (Version 6.1.79 and earlier). Mitigation: Update your UniFi Protect Application to Version 6.2.72 or later.

Affected products

• UI UniFi Protect: before 6.2.72 (fixed in 6.2.72)

Published 2026-01-05. Last modified 2026-06-17.