CVE-2026-77553CWE-284broken-access-control

CVE-2026-77553

Critical · published August 26, 2026

CVSS v3.1
9.9
EPSS
0%
Percentile
39.6
In the wild
Unconfirmed
What it is

A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in UniFi Access Application to escalate privileges on the host device.

The record
Technical detail
CVSS v3.1
9.9 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00468 · 39.6th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-08-26T15:16Z
References (1)
https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9 · fe490ce8-0395-4072-90d8-2707e1bdf984
EPSS history
Timeline
  • 28 AUG 06:53Z
    EPSS moved — → 0%
    epss
  • 26 AUG 10:42Z
    A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in UniFi Access Application to…
    cvelistv5