CVE-2026-21634

MEDIUM

UniFi Protect < 6.2.72 - Denial of Service via Discovery Protocol Overflow

Title source: llm

Description

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.

References (1)

Core 1

Core References

Vendor Advisory

https://community.ui.com/releases/Security-Advisory-Bulletin-058-058/6922ff20-8cd7-4724-8d8c-676458a2d0f9

Scores

CVSS v3 6.5

EPSS 0.0035

EPSS Percentile 26.5%

Attack Vector ADJACENT_NETWORK

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-119

Status published

Products (1)

ui/unifi_protect < 6.2.72

Published Jan 05, 2026

Tracked Since Feb 18, 2026