CVE-2026-54405 Denial of service in UniFi Network Application

High 7.5 Published 2 Jul 2026 Updated 2 Jul 2026

A remote attacker can cause a Denial of Service in the UniFi Network Application via improper input validation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-54405?

CVE-2026-54405 is a high-severity denial of service vulnerability in Ubiquiti Inc UniFi Network Application, published on 2 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi Network Application to execute a Denial of Service (DoS) attack on the application.

Weakness: CWE-20

Which versions are affected by CVE-2026-54405?

It affects 1 product.

Products include Ui Unifi Network Application.

How do I fix CVE-2026-54405?

No fix has been published for CVE-2026-54405 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-54405 being exploited?

There is no known exploitation of CVE-2026-54405 in the wild and no public exploit code.

Sources

Also known as GHSA-j2cq-vphm-g3w3.