Is CVE-2026-54405 in the CISA KEV catalog?

No. CVE-2026-54405 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-54405?

CVE-2026-54405 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2026-54405?

CVE-2026-54405 has an EPSS score of 0.26% (18th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-54405?

Upgrade unifi network application to 10.4.57 or later.

CVE & CISA-KEV Catalog

CVE-2026-54405

HIGH

7.5

CVSS v3

NVD

Description

A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi Network Application to execute a Denial of Service (DoS) attack on the application.

CWE-20Improper Input Validation

How to fix

Remediation Available

unifi network applicationNVD

Affected:< 10.4.57Fixed in:10.4.57CVE-2026-54405derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.26%probability of exploitation in 30 days

18thpercentile

Low risk: more likely to be exploited than 18% of all known CVEs.

References

Vendor Advisory1

community.ui.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-02.