ZDI-26-385: Unraid Web Server FileUpload Command Injection Remote Code Execution Vulnerability
A command injection vulnerability exists in the Unraid Web Server's FileUpload.php component that allows authenticated remote attackers to execute arbitrary code as the www-data user. This flaw is due to improper validation of user-supplied input used in a system call. The vulnerability has a CVSS rating of 8.8 and affects Unraid versions prior to 7.3.0. It was fixed in Unraid version 7.3.0. Exploitation requires authentication, and no known exploits are currently reported in the wild.
AI Analysis
Technical Summary
CVE-2026-9772 is a remote code execution vulnerability in Unraid's web server, specifically in the FileUpload.php script. The vulnerability arises from insufficient validation of a user-supplied string before it is used in a system call, enabling authenticated attackers to execute arbitrary commands with the privileges of the www-data user. This vulnerability affects Unraid versions before 7.3.0 and was addressed in the 7.3.0 stable release. The CVSS score assigned by ZDI is 8.8, indicating a high-severity issue. No public exploits are known at this time.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary code remotely on the affected Unraid server with www-data user privileges. This can lead to full compromise of the affected system, including confidentiality, integrity, and availability impacts.
Mitigation Recommendations
Upgrade Unraid installations to version 7.3.0 or later, where this vulnerability has been fixed. Since the vulnerability requires authentication, ensure that access controls and authentication mechanisms are properly enforced until the update is applied.
ZDI-26-385: Unraid Web Server FileUpload Command Injection Remote Code Execution Vulnerability
Description
A command injection vulnerability exists in the Unraid Web Server's FileUpload.php component that allows authenticated remote attackers to execute arbitrary code as the www-data user. This flaw is due to improper validation of user-supplied input used in a system call. The vulnerability has a CVSS rating of 8.8 and affects Unraid versions prior to 7.3.0. It was fixed in Unraid version 7.3.0. Exploitation requires authentication, and no known exploits are currently reported in the wild.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-9772 is a remote code execution vulnerability in Unraid's web server, specifically in the FileUpload.php script. The vulnerability arises from insufficient validation of a user-supplied string before it is used in a system call, enabling authenticated attackers to execute arbitrary commands with the privileges of the www-data user. This vulnerability affects Unraid versions before 7.3.0 and was addressed in the 7.3.0 stable release. The CVSS score assigned by ZDI is 8.8, indicating a high-severity issue. No public exploits are known at this time.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary code remotely on the affected Unraid server with www-data user privileges. This can lead to full compromise of the affected system, including confidentiality, integrity, and availability impacts.
Mitigation Recommendations
Upgrade Unraid installations to version 7.3.0 or later, where this vulnerability has been fixed. Since the vulnerability requires authentication, ensure that access controls and authentication mechanisms are properly enforced until the update is applied.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-385/","fetched":true,"fetchedAt":"2026-06-24T22:24:34.496Z","wordCount":177}
- Classification
- {"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
Threat ID: 6a3c59a14853345fc1ee95bf
Added to database: 06/24/2026, 22:26:41 UTC
Last enriched: 07/23/2026, 23:12:40 UTC
Last updated: 08/08/2026, 19:10:17 UTC
Views: 99
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