Vulnerability in Ubiquiti Inc Unifi Connect Display Cast Pro

CVE-2026-77551

A malicious actor with access to the network and under certain conditions could exploit an Improper Access Control vulnerability found in UniFi Connect Display Cast Pro to escalate privileges on the device.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (29.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.3% 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-2026-77551: held from 0.002 to 0.004.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-77551?
CVE-2026-77551 is a critical-severity vulnerability in Ubiquiti Inc Unifi Connect Display Cast Pro, classified under Improper Access Control. CVSS score: 9.0/10. Published 2026-08-26.
How severe is CVE-2026-77551?
Critical severity. CVSS v3 base score is 9.0 out of 10.