External risk intelligence

Waterfall WF-500 OS Command Injection Vulnerability.

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2025-41269

The vulnerability exists in the WebUI of an industrial security appliance designed to act as a gateway. Such devices are typically deployed at the network edge to facilitate data flow and monitoring, and the vulnerability allows for unauthenticated remote access to the device's operating system, which is characteristic of exposed internet-facing management surfaces.

OS Command Injection

Waterfall Security Wf 500 Firmware

7.9.1.0_r2502171040 and earlier

Halo Surface Signal: 5 out of 5 — more likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in Waterfall WF-500 devices, specifically in their Console WebUI. This issue allows attackers to remotely execute commands on the affected devices without needing any authentication, posing a significant security risk. The main concern is confirming whether our environment has these devices and, if so, assessing the potential exposure.

Unauthenticated attackers can run commands remotely.
This vulnerability affects industrial security network gateways.
Confirm relevance and exposure for affected devices.

Attack Path

How an attacker could exploit the issue

An attacker can reach a vulnerable component in Waterfall WF-500 devices by targeting the Console WebUI, which is exposed remotely and requires no authentication. By sending specially crafted input to this interface, an attacker can trick the device into executing arbitrary operating system commands. This could allow an attacker to gain full control over the affected appliance.

Remotely accessible web interface.
Input to the Console WebUI.
Arbitrary operating system command execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow remote attackers to execute arbitrary operating system commands on the device when supported by the advisory, potentially impacting its operational integrity.

Device operating system commands at risk.
Commands executed through the WebUI interface.
Device compromise and potential loss of control.

Operational Fix

Recommended remediation, mitigation, and detection steps

The critical OS command injection vulnerability in Waterfall WF-500 hosts requires immediate attention from teams managing industrial control system (ICS) security and network edge devices. Initial actions should focus on identifying all deployed WF-500 units, confirming their network exposure, and assessing their criticality to operations before planning remediation. This coordinated effort will ensure that the highest-risk devices are addressed first.

Waterfall Security and ICS security teams own the issue.
Verify WF-500 network exposure and operational criticality.
Plan remediation based on identified risk and business impact.

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 the Waterfall WF-500?

The Waterfall WF-500 is an industrial security appliance designed as a network gateway. It is used to securely facilitate data flow and monitoring between different security zones, such as connecting operational technology environments to external networks.

What does CWE-78 mean for CVE-2025-41269?

CWE-78 refers to OS Command Injection. In the context of CVE-2025-41269, this means the device's web interface fails to properly filter user input. An attacker can supply malicious commands that the underlying operating system executes, potentially giving them full control over the appliance.

How can an attacker trigger this vulnerability?

An attacker triggers this by sending specifically crafted input to the Console WebUI. Because the vulnerability does not require authentication, anyone with network access to that web interface can send these inputs. Requests that do not interact with the vulnerable components of the web interface will not trigger the command injection.

Is my device at risk based on Halo Surface Signal?

Halo Surface Signal identifies this as high risk because the WF-500 is an industrial gateway often placed at the network edge. If your console interface is reachable from outside your protected network, it faces an increased likelihood of being targeted by remote, unauthenticated actors.

What should I do if I manage Waterfall WF-500 units?

Start by identifying every WF-500 unit in your environment and verifying where they are placed on your network. Check if their management consoles are exposed to wider network segments, then assess the operational criticality of those specific units to prioritize your response.

References

www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-41269

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.