Executive brief
A security vulnerability has been identified in Ubiquiti UniFi OS, the software used to manage various networking and security devices like routers, firewalls, and video recorders. An attacker with low-level access to the network could take full control of the device by executing unauthorized commands. This could lead to a complete compromise of the network infrastructure, data theft, or service disruptions.
Technical details
An improper input validation vulnerability (CWE-20) exists in Ubiquiti UniFi OS across multiple hardware platforms. A remote attacker with low-level authenticated access can exploit this flaw to perform command injection on the underlying host operating system. The vulnerability is characterized by a CVSS 3.1 score of 9.9, indicating a high impact on confidentiality, integrity, and availability with scope change. The issue affects various UniFi products including Dream Machines, Cloud Gateways, and Network Video Recorders running versions prior to 5.1.19. Users are advised to update to UniFi OS version 5.1.19 or later to mitigate this risk.
Affected products
- Ubiquiti Inc UniFi OS Server < 5.1.19
- Ubiquiti Inc Dream Machines < 5.1.19
- Ubiquiti Inc Enterprise Fortress Gateway < 5.1.19
- Ubiquiti Inc Dream Wall < 5.1.19
- Ubiquiti Inc Dream Routers < 5.1.19
- Ubiquiti Inc Express 7 < 5.1.19
- Ubiquiti Inc Cloud Keys < 5.1.19
- Ubiquiti Inc Network Video Recorders < 5.1.19
- Ubiquiti Inc Enterprise Video Recorders < 5.1.19
- Ubiquiti Inc Cloud Gateways < 5.1.19
- Ubiquiti Inc Network Attached Storage < 5.1.19
- Ubiquiti Inc Enterprise Firewall Core < 5.1.19
Timeline
- 2026-07-02: disclosed
- 2026-07-02: advisory