Improper input validation in Ubiquiti Inc Unifi Talk Application

CVE-2026-77554

A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi Talk Application to execute a Command Injection on the host device.

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

Published · last modified .

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.6th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.6% 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-2026-77554: rose from 0.010 to 0.016.

EPSS over last 30 days · oldest: 0.010 · newest: 0.016 · change: +0.006

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-77554?
CVE-2026-77554 is a critical-severity vulnerability in Ubiquiti Inc Unifi Talk Application, classified under Improper Input Validation. CVSS score: 10.0/10. Published 2026-08-26.
How severe is CVE-2026-77554?
Critical severity. CVSS v3 base score is 10.0 out of 10.