Intel

CVE-2026-77557

UniFi: Improper Access Control (CVE-2026-77557)

criticalEPSS 0.5%

Affected

  • Ubiquiti/UniFi = OS..OS

Description

A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi Protect AI Key to escalate privileges on the device.

Source: BSI WID PortalBSI CSAFNVD (NIST)CVE.org (MITRE)cvelistv5

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

UbiquitiUniFi
OS

Metrics

XIEM Effective CVSS
9.8
Source: cna-v3
EPSS percentile
44.2 %
High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
—
Show all metrics
Severity
critical
Priority score
91.72
Exploit maturity
no public PoC known
CVSS v3
9.8
EPSS score
0.5 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-08-26 11:16 UTC
CWE
CWE-284

Weakness classes (CWE)

  • CWE-284Pillar

    Improper Access Control

    The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

    cwe.mitre.org →

References & sources