ZDI-26-171: Unraid Update Request Path Traversal 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 ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2026-3838.
AI Analysis
Technical Summary
This vulnerability in Unraid's update.php file arises from insufficient validation of user-supplied paths used in file operations, enabling authenticated remote attackers to perform path traversal and execute arbitrary code as root. The flaw allows attackers to escalate privileges and compromise the system. The issue was responsibly disclosed to the vendor on February 19, 2026, and publicly released on March 9, 2026. The vendor addressed the vulnerability in Unraid version 7.2.4.
Potential Impact
Successful exploitation allows authenticated remote attackers to execute arbitrary code with root privileges on affected Unraid installations. This can lead to full system compromise, including confidentiality, integrity, and availability impacts as indicated by the CVSS vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Mitigation Recommendations
Apply the official patch by upgrading Unraid to version 7.2.4 or later, where this vulnerability is fixed. Since the vendor has released an official fix, remediation should be performed promptly to prevent exploitation. No additional mitigations are specified in the advisory.
ZDI-26-171: Unraid Update Request Path Traversal Remote Code Execution Vulnerability
Description
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Unraid. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2026-3838.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Unraid's update.php file arises from insufficient validation of user-supplied paths used in file operations, enabling authenticated remote attackers to perform path traversal and execute arbitrary code as root. The flaw allows attackers to escalate privileges and compromise the system. The issue was responsibly disclosed to the vendor on February 19, 2026, and publicly released on March 9, 2026. The vendor addressed the vulnerability in Unraid version 7.2.4.
Potential Impact
Successful exploitation allows authenticated remote attackers to execute arbitrary code with root privileges on affected Unraid installations. This can lead to full system compromise, including confidentiality, integrity, and availability impacts as indicated by the CVSS vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Mitigation Recommendations
Apply the official patch by upgrading Unraid to version 7.2.4 or later, where this vulnerability is fixed. Since the vendor has released an official fix, remediation should be performed promptly to prevent exploitation. No additional mitigations are specified in the advisory.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-171/","fetched":true,"fetchedAt":"2026-05-26T20:01:51.980Z","wordCount":171}
Threat ID: 6a15fc94e29bf47b5055e510
Added to database: 5/26/2026, 8:03:32 PM
Last enriched: 5/26/2026, 8:25:47 PM
Last updated: 5/27/2026, 4:54:42 AM
Views: 2
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