CVE-2026-55116

critical

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.

References

References
More

https://www.bleepingcomputer.com/news/security/ubiquiti-warns-of-new-max-severity-unifi-os-vulnerability/

https://thehackernews.com/2026/07/ubiquiti-patches-critical-unifi-flaws.html

https://securityaffairs.com/194978/security/ubiquiti-patches-critical-unifi-os-flaws-allowing-command-injection-and-privilege-escalation.html

https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc

Details

Source: Mitre, NVD

Published: 2026-07-02

Updated: 2026-07-09

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H