CVE-2026-77536CWE-284broken-access-control

CVE-2026-77536

Critical · published August 26, 2026

CVSS v3.1
9.9
EPSS
0%
Percentile
35.0
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 certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances.

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
0.00417 · 35.0th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-08-26T14:16Z
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 09:35Z
    A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devices running UniFi…
    cvelistv5