# CVE-2026-54405: Ubiquiti UniFi Network Application improper input validation DoS

Source: https://junglewise.ai/threats/cve-2026-54405-ubiquiti-unifi-network-application-improper-input-validation-dos  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-02. Updated: 2026-07-02  
License: CC BY 4.0 with a link back

CVE-2026-54405 · Severity: high · CVSS 7.5 · Published 2026-07-02

Ubiquiti UniFi Network Application, which is used to manage and configure UniFi networking devices, is vulnerable to a denial-of-service attack. An attacker with network access can exploit this flaw to crash the application or make it unresponsive. This could prevent administrators from managing their network infrastructure or monitoring device status until the service is restored.

Technologies: [Ubiquiti UniFi Network Application](https://junglewise.ai/threats/technologies/unifi-network-application). Vendors: [Ubiquiti](https://junglewise.ai/threats/vendors/ubiquiti).

## Quick answers

**Is CVE-2026-54405 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54405 being exploited in the wild.

**How severe is CVE-2026-54405?** High severity, with a CVSS score of 7.5, published 2 July 2026.

**Which products and versions are affected?** Ubiquiti UniFi Network Application versions before 10.4.57.

**Is there a fix for CVE-2026-54405?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-54405 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-54405?** Check whether you run Ubiquiti UniFi Network Application at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An improper input validation vulnerability (CWE-20) exists in the Ubiquiti UniFi Network Application. A remote, unauthenticated attacker can exploit this by sending specially crafted network requests to the application. Successful exploitation allows the attacker to trigger a Denial of Service (DoS) condition, impacting the availability of the management interface. The vulnerability is addressed in UniFi Network Application version 10.4.57 and later.

## Affected products

- Ubiquiti Inc UniFi Network Application versions before 10.4.57

## Timeline

- 2026-07-02: advisory
- 2026-07-02: disclosed

## References

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

## Related threats

- [Ubiquiti UniFi Network Application privilege escalation](https://junglewise.ai/threats/cve-2026-77541-ubiquiti-unifi-network-application-privilege-escalation)
- [Ubiquiti UniFi Network Application command injection via improper input validation](https://junglewise.ai/threats/cve-2026-77535-ubiquiti-unifi-network-application-command-injection-via-improper)
- [Ubiquiti UniFi Network Application incorrect authorization](https://junglewise.ai/threats/cve-2026-56842-ubiquiti-unifi-network-application-incorrect-authorization)
- [Ubiquiti UniFi Network Application privilege escalation via improper access control](https://junglewise.ai/threats/cve-2026-55114-ubiquiti-unifi-network-application-privilege-escalation-via)
- [Ubiquiti UniFi Network Application path traversal in self-hosted instances](https://junglewise.ai/threats/cve-2026-54406-ubiquiti-unifi-network-application-path-traversal-in-self-hosted)