How severe is CVE-2026-55118?

CVE-2026-55118 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability high.

Is CVE-2026-55118 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-55118?

CVE-2026-55118 affects Ui Unifi Network Application. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-55118?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-55118 published?

CVE-2026-55118 was published on 2026-07-02 and last updated on 2026-07-06.

CVE-2026-55118

CVE-2026-55118 is a high-severity vulnerability in Ui Unifi Network Application with a CVSS 3.x base score of 8.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 8.3)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Ui Unifi Network Application
Published: 2026-07-02
Last modified: 2026-07-06

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.

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.
How severe is CVE-2026-55118?: CVE-2026-55118 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability high.
Is CVE-2026-55118 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-55118?: CVE-2026-55118 affects Ui Unifi Network Application. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-55118?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-55118 published?: CVE-2026-55118 was published on 2026-07-02 and last updated on 2026-07-06.

References

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

Affected products (1)

cpe:2.3:a:ui:unifi_network_application:*:*:*:*:*:*:*:*

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