CVE-2026-9772

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.

CVSS v3.1 Score

8.8

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0111

Probability of exploitation

0.62%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-78 OS Command Injection

Affected Products

Vendor	Product	Versions
unraid	unraid	< 7.3.0

References

Other References

https://www.zerodayinitiative.com/advisories/ZDI-26-385/

Frequently Asked Questions

What is CVE-2026-9772? +

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. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-9772? +

CVE-2026-9772 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0111, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-9772? +

CVE-2026-9772 affects products from unraid, specifically: unraid. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-9772? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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