External risk intelligence

Open XDMoD Command Execution Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-45777

Open XDMoD is an HPC metrics analysis tool typically deployed within internal research or academic network environments to monitor infrastructure, rather than as a public-facing web service. While it is a web application and potentially reachable if exposed, it is not standard practice to expose such performance monitoring portals directly to the public internet.

OS Command Injection

Buffalo Open Xdmod

9.5.0 to before 11.0.3

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

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in Open XDMoD, an HPC metrics analysis framework, affecting versions 9.5.0 through 11.0.2. This flaw allows remote attackers to execute arbitrary system commands, potentially leading to unauthorized access, modification of data, or service disruption. While there is currently no evidence of exploitation, the severity of this vulnerability necessitates a review of affected systems.

Remote attackers can run commands on servers.
Affects HPC metrics analysis tools.
Confirm relevance and exposure of this tool.

Attack Path

How an attacker could exploit the issue

An attacker could reach an exposed web server running Open XDMoD and execute arbitrary commands. By exploiting this vulnerability, an attacker could gain control over the server, allowing them to access or change sensitive data and disrupt operations.

No authentication or special access needed.
Remotely trigger command execution.
Full server control risk.

Live Threat

Current exploitation, exposure, and threat context

When supported by the advisory, this vulnerability could allow an attacker to remotely execute arbitrary system commands on the web server hosting Open XDMoD. This could lead to the modification or reading of application data, changes to system configuration, or disruption of service availability.

System commands on web server.
Remote execution of arbitrary commands.
Potential disruption or modification of service.

Operational Fix

Recommended remediation, mitigation, and detection steps

The application owner or platform team is likely responsible for addressing this critical vulnerability in Open XDMoD. The immediate priority is to identify all instances of the affected software, assess their exposure and business criticality, and then plan remediation. Coordination with the vendor for patching or applying manual workarounds is essential.

Identify affected Open XDMoD instances.
Verify exposure and business criticality.
Plan and coordinate remediation.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Open XDMoD?

Open XDMoD is an open-source framework designed for high-performance computing (HPC) environments. Administrators use it to collect, analyze, and report on infrastructure metrics, helping them understand how computing resources are being utilized. It functions as a web-based dashboard that visualizes system performance data for research and academic institutions.

How does CVE-2026-45777 impact Open XDMoD?

This vulnerability is classified as CWE-78, which refers to improper neutralization of special elements used in an OS command. In plain English, the application fails to properly filter input, allowing an attacker to inject their own commands into the system. Because the web server process runs these commands, the attacker gains the same level of authority as the server itself.

Do I need to be authenticated to trigger this flaw?

No, this vulnerability does not require authentication. An attacker can attempt to trigger it remotely without needing valid user credentials. Simply interacting with the vulnerable web interface is sufficient to initiate the command execution. However, the attack will only succeed if the server is reachable; it cannot be triggered by someone who lacks network access to the web application.

Is my deployment at risk according to Halo Surface Signal?

Halo Surface Signal notes that Open XDMoD is generally used for internal infrastructure monitoring within research or academic networks rather than being public-facing. While the software is inherently vulnerable, your specific risk level depends on whether you have exposed this internal dashboard to the broader internet. Systems kept on private, restricted networks are less reachable to external attackers.

When should I update my Open XDMoD software?

You should prioritize updating as soon as possible. The vulnerability is fully patched in version 11.0.3, which was released in May 2026. If you cannot perform a full software update immediately, the advisory recommends applying the provided manual patch to secure your server against unauthorized command execution.

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.