# CVE-2026-77537: Ubiquiti UniFi Protect command injection via improper input validation

Source: https://junglewise.ai/threats/cve-2026-77537-ubiquiti-unifi-protect-command-injection-via-improper-input  
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-2026-77537 · Severity: critical · CVSS 10 · Published 2026-08-26

UniFi Protect is a surveillance and video management system deployed by enterprises to monitor and secure physical locations. A network-accessible command injection vulnerability allows an attacker with network access to execute arbitrary commands on the host device, potentially leading to complete system compromise, data theft from surveillance footage, or operational disruption.

Technologies: [Ubiquiti UniFi Protect](https://junglewise.ai/threats/technologies/unifi-protect). Vendors: [Ubiquiti](https://junglewise.ai/threats/vendors/ubiquiti).

## Quick answers

**Is CVE-2026-77537 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-77537 being exploited in the wild.

**How severe is CVE-2026-77537?** Critical severity, with a CVSS score of 10, published 26 August 2026.

**Which products and versions are affected?** Ubiquiti UniFi Protect.

**Is there a fix for CVE-2026-77537?** 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-2026-77537 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-77537?** Check whether you run Ubiquiti UniFi Protect. 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

This vulnerability is a command injection flaw arising from improper input validation in the UniFi Protect application. The vulnerability can be exploited by a network-adjacent attacker without authentication to inject and execute arbitrary operating system commands on the host device. The attack requires no user interaction and succeeds because user-supplied input is not properly sanitized before being passed to shell execution functions. Successful exploitation grants the attacker complete control over the host device, including read/write access to surveillance data, system configuration, and potential lateral movement within the network.

## Affected products

- Ubiquiti UniFi Protect

## 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 Protect command injection via input validation](https://junglewise.ai/threats/cve-2026-77548-ubiquiti-unifi-protect-command-injection-via-input-validation)
- [Ubiquiti UniFi Protect command injection via improper input validation](https://junglewise.ai/threats/cve-2026-77533-ubiquiti-unifi-protect-command-injection-via-improper-input)
- [Ubiquiti UniFi Protect SQL injection privilege escalation](https://junglewise.ai/threats/cve-2026-56841-ubiquiti-unifi-protect-sql-injection-privilege-escalation)
- [Ubiquiti UniFi Protect auth bypass in data streaming](https://junglewise.ai/threats/cve-2026-54408-ubiquiti-unifi-protect-auth-bypass-in-data-streaming)