🛡️ CVE-2026-55116 — unifi-connect

🔴 CVSS 9.0 — Critical ✅ No Known Exploit CWE-284 NVD
9.0
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2026-55116 is classified as CWE-284: Improper Access Control. The software does not restrict an action to the actors that should be allowed to perform it.

Affected software

CVE-2026-55116 is recorded against 1 package.

  • unifi-connect (fixed in 3.4.20)

Timeline and source

Published on 2 July 2026 and last revised on 9 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

community.ui.com

Details

Severity CRITICAL
CVSS Score 9.0
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE CWE-284
Public Exploit ✅ No
Source NVD
Published 2026-07-02
Updated 2026-08-11
Modified 2026-07-09
Fix URL N/A

Affected Packages

Software From version Fixed in
unifi-connect — 3.4.20

Similar Threats

Exploit Protection

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CVE-2026-55116 carries CVSS 9.0 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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