External risk intelligence

OpenMediaVault OS Command Injection Vulnerability in openmediavault-md plugin

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-52102

OpenMediaVault is network-attached storage (NAS) software that provides a web-based management interface. While typically deployed within internal networks, these interfaces are sometimes exposed to the internet by users for remote access, making them plausibly reachable, though such public exposure is not the standard or intended deployment configuration for a NAS device.

OS Command Injection

Halo Surface Signal: 3 out of 5 — possibly public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

An OS command injection vulnerability has been identified in a plugin for OpenMediaVault, a network-attached storage management software. This flaw could allow unauthorized individuals to execute commands with root privileges on affected systems. The main concern is confirming whether this software is in use and potentially exposed externally.

Unauthenticated attackers can run commands on affected systems.
Critical vulnerability in common NAS management software.
Confirm relevance and external exposure.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by sending specially crafted commands over the network to the OpenMediaVault web interface. The vulnerable openmediavault-md plugin processes these commands without proper sanitization, allowing the attacker to inject shell metacharacters. This can lead to the execution of arbitrary commands with root privileges on the affected system.

No authentication or user interaction required.
Injecting shell metacharacters into plugin input.
Arbitrary command execution as root.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability in the openmediavault-md plugin could allow an unauthenticated attacker to execute arbitrary commands as the root user when the plugin is exposed to the network. This could lead to a complete compromise of the affected system.

Root command execution.
Network-accessible plugin.
System compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

This critical vulnerability in the OpenMediaVault `openmediavault-md` plugin requires immediate attention from teams managing network-attached storage (NAS) devices. The first practical step is to identify all instances of OpenMediaVault, determine their exposure (especially internet-facing ones), and locate the accountable system owner. Subsequently, a risk-based remediation plan, which may involve vendor coordination or temporary mitigation, should be developed and executed during a planned maintenance window.

Application or infrastructure owners should manage this issue.
Verify OpenMediaVault instances and internet exposure.
Plan remediation based on identified risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is OpenMediaVault and how is it used?

OpenMediaVault is a Debian-based software solution designed for network-attached storage (NAS). It is commonly used to manage shared file systems, drives, and network services through a centralized web-based interface, allowing users to turn standard hardware into a flexible storage server.

What does CWE-78 OS command injection mean for CVE-2026-52102?

CWE-78 refers to improper neutralization of special elements used in an OS command. In the context of CVE-2026-52102, this means the software fails to filter input properly. An attacker can insert shell metacharacters, effectively tricking the system into running unauthorized, arbitrary commands with the highest level of system authority, known as root privileges.

How can an attacker trigger this vulnerability?

An attacker triggers this by sending specially crafted input over the network to the vulnerable plugin. This process does not require the attacker to have an account, nor does it need any user interaction. Note that the vulnerability is specific to the handling of input within the openmediavault-md plugin; it does not originate from standard administrative actions that have been properly sanitized.

Is my OpenMediaVault installation at risk?

According to Halo Surface Signal, risk depends heavily on network placement. While OpenMediaVault is primarily intended for internal network use, it becomes significantly more vulnerable if the management interface is exposed to the public internet. Systems reachable from outside your local network are the primary concern for this type of network-based attack.

What should I do if I run OpenMediaVault?

First, conduct an inventory to locate all instances of OpenMediaVault within your environment. Verify whether any of these management interfaces are accessible from the internet. Once you have identified your assets and their connectivity status, prioritize restricting network access to these devices and prepare for a maintenance window to apply necessary security updates or vendor-provided mitigations.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.