CVE-2026-55118

Description

A malicious actor with access to the network,low privileges and under certain conditions could exploit an Improper Access Control vulnerability found in UniFi Network Application to escalate privileges within the UniFi Network Application.

CVSS v3.1 Score

8.3

HIGH

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

EPSS — Exploit Prediction

0.0020

Probability of exploitation

0.09%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-284 CWE-284

Affected Products

Vendor	Product	Versions
ui	unifi_network_application	< 10.4.57

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2026-55118? +

A malicious actor with access to the network,low privileges and under certain conditions could exploit an Improper Access Control vulnerability found in UniFi Network Application to escalate privileges within the UniFi Network Application. It has a CVSS v3.1 base score of 8.3 (HIGH).

How severe is CVE-2026-55118? +

CVE-2026-55118 has a CVSS v3.1 score of 8.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0020, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-55118? +

CVE-2026-55118 affects products from ui, specifically: unifi_network_application. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-55118? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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