# CVE-2026-77535: Ubiquiti UniFi Network Application command injection via improper input validation

Source: https://junglewise.ai/threats/cve-2026-77535-ubiquiti-unifi-network-application-command-injection-via-improper  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-26. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-77535 · Severity: critical · CVSS 9.1 · Published 2026-08-26

UniFi Network Application is a centralized management platform for Ubiquiti network devices. A privileged network-based attacker can exploit improper input validation to inject and execute arbitrary commands on adopted network devices, potentially compromising network infrastructure, intercepting traffic, or disrupting service availability.

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-2026-77535 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-77535 being exploited in the wild.

**How severe is CVE-2026-77535?** Critical severity, with a CVSS score of 9.1, published 26 August 2026.

**Which products and versions are affected?** Ubiquiti UniFi Network Application <UNKNOWN>.

**Is there a fix for CVE-2026-77535?** 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-2026-77535 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-77535?** 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

The vulnerability is an Improper Input Validation flaw in the UniFi Network Application that permits Command Injection attacks. An attacker with network access and high privileges can supply malicious input that is not properly sanitized before being executed on an adopted device managed by the application. This allows remote code execution on network devices under UniFi management. The attack requires both network reachability to the application and elevated privileges. No information on available patches was provided in the advisory excerpt.

## Affected products

- Ubiquiti UniFi Network Application <UNKNOWN>

## Timeline

- 2026-08-26: disclosed

## References

- [https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9](https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9)

## 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 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)
- [Ubiquiti UniFi Network Application improper input validation DoS](https://junglewise.ai/threats/cve-2026-54405-ubiquiti-unifi-network-application-improper-input-validation-dos)