Ubiquiti UniFi OS Server up to 5.1.18 server-side request forgery

Summaryinfo

A vulnerability was found in Ubiquiti UniFi OS Server, Dream Machines, Enterprise Fortress Gateway, Dream Wall, Dream Routers, Express 7, Cloud Keys, Network Video Recorders, Enterprise Video Recorders, Cloud Gateways, Network Attached Storage and Enterprise Firewall Core up to 5.1.18 and classified as critical. Affected is an unknown function. Executing a manipulation can lead to server-side request forgery. This vulnerability is handled as CVE-2026-54401. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Ubiquiti UniFi OS Server, Dream Machines, Enterprise Fortress Gateway, Dream Wall, Dream Routers, Express 7, Cloud Keys, Network Video Recorders, Enterprise Video Recorders, Cloud Gateways, Network Attached Storage and Enterprise Firewall Core up to 5.1.18. It has been declared as critical. This vulnerability affects an unknown code. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A malicious actor with access to the network and low privileges could exploit a Server-Side Request Forgery (SSRF) to escalate privileges within such UniFi OS devices or instances.

The advisory is available at community.ui.com. This vulnerability was named CVE-2026-54401 since 06/13/2026. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available.

Upgrading to version 5.1.19 eliminates this vulnerability. The upgrade is hosted for download at community.ui.com.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Network Attached Storage Software

Vendor

• Ubiquiti

Name

• Cloud Gateways
• Cloud Keys
• Dream Machines
• Dream Routers
• Dream Wall
• Enterprise Firewall Core
• Enterprise Fortress Gateway
• Enterprise Video Recorders
• Express 7
• Network Attached Storage
• Network Video Recorders
• UniFi OS Server

Version

• 5.1.0
• 5.1.1
• 5.1.2
• 5.1.3
• 5.1.4
• 5.1.5
• 5.1.6
• 5.1.7
• 5.1.8
• 5.1.9
• 5.1.10
• 5.1.11
• 5.1.12
• 5.1.13
• 5.1.14
• 5.1.15
• 5.1.16
• 5.1.17
• 5.1.18

License

• commercial

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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