#VU123326 Buffer overflow in UniFi Protect Application - CVE-2026-21634

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Main Vulnerability Database Vulnerabilities #VU123326

#VU123326 Buffer overflow in UniFi Protect Application - CVE-2026-21634

Published: February 27, 2026


Vulnerability identifier: #VU123326
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-21634
CWE-ID: CWE-119
Exploitation vector: Adjecent network
Exploit availability: No public exploit available
Vulnerable software:
UniFi Protect Application
Software vendor:
Ubiquiti Networks

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within the parsing of WebSocket headers. A remote attacker on the local network can trigger memory corruption and cause a denial of service condition on the target system.


Remediation

Install updates from vendor's website.

External links