Improper input validation in Ubiquiti Inc Unifi Network Application

CVE-2026-77535

A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi Network Application to execute a Command Injection on an adopted device.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.5th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-77535: held from 0.008 to 0.013.

EPSS over last 30 days · oldest: 0.008 · newest: 0.013 · change: +0.005

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-77535?
CVE-2026-77535 is a critical-severity vulnerability in Ubiquiti Inc Unifi Network Application, classified under Improper Input Validation. CVSS score: 9.1/10. Published 2026-08-26.
How severe is CVE-2026-77535?
Critical severity. CVSS v3 base score is 9.1 out of 10.