CVE-2026-9772
Received Received - Intake
FileUpload Command Injection in Unraid Web Server

Publication date: 2026-06-24

Last updated on: 2026-06-24

Assigner: Zero Day Initiative

Description
Unraid Web Server FileUpload Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Unraid. Authentication is required to exploit this vulnerability. The specific flaw exists within FileUpload.php. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the www-data user. Was ZDI-CAN-30116.
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Meta Information
Published
2026-06-24
Last Modified
2026-06-24
Generated
2026-06-25
AI Q&A
2026-06-25
EPSS Evaluated
N/A
NVD
CVE-2026-9772
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
unraid unraid *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
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Executive Summary

This vulnerability exists in the Unraid Web Server specifically in the FileUpload.php file. It is a command injection flaw that allows remote attackers, who have authentication, to execute arbitrary code on the affected system. The root cause is the lack of proper validation of a user-supplied string before it is used in a system call, enabling attackers to run commands with the privileges of the www-data user.

Impact Analysis

This vulnerability can have a severe impact as it allows an authenticated remote attacker to execute arbitrary code on the affected Unraid server. This could lead to full compromise of the system, including unauthorized access, data theft, data modification, or disruption of services. The attacker gains the ability to run commands with the privileges of the web server user, which can be leveraged to escalate privileges or move laterally within a network.

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