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CRITICAL · 9.0

CVE-2026-55116

A malicious actor with access to the network and under certain network configurations could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to make unauthori...

Vulnerability Description

A malicious actor with access to the network and under certain network configurations could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to make unauthorized changes to such UniFi OS devices.

CVSS Score

9.0

CRITICAL

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
UiUnifi Connect< 3.4.20

Related Weaknesses (CWE)

CWE-284

References

FAQ

What is CVE-2026-55116?

CVE-2026-55116 is a vulnerability with a CVSS score of 9.0 (CRITICAL). A malicious actor with access to the network and under certain network configurations could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to make unauthori...

How severe is CVE-2026-55116?

CVE-2026-55116 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-55116?

Check the references section above for vendor advisories and patch information. Affected products include: Ui Unifi Connect.