External risk intelligence

Netcore NR289-GE Router Command Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-101072

The vulnerability affects a CGI handler component in a router device. Such administrative or management interfaces are commonly exposed via web-based management portals on network edge devices, making them reachable from the network.

OS Command Injection

Halo Surface Signal: 4 out of 5 — 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 a router's CGI handler component, potentially allowing remote command injection. This means an attacker could execute arbitrary commands on the affected device without needing prior access or authentication, posing a significant risk to network integrity and security.

Network device commands could be executed remotely.
Critical flaw impacts network management and security.
Assess exposure and confirm device relevance.

Attack Path

How an attacker could exploit the issue

An attacker can remotely trigger this vulnerability by sending specially crafted requests to the device's web interface. The targeted component, CGI Handler, processes an argument within the `/ap_ip.cgi` file, which is susceptible to command injection. This flaw could allow an attacker to execute arbitrary operating system commands on the device.

Attacker sends malicious request to device.
Vulnerable CGI function processes untrusted input.
Risk of arbitrary OS command execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated, remote attacker to execute arbitrary operating system commands on affected devices. This is possible by manipulating an input parameter within the `/ap_ip.cgi` script, leading to command injection.

System commands on the router.
Remote, unauthenticated input manipulation.
Potential compromise of device integrity.

Operational Fix

Recommended remediation, mitigation, and detection steps

This critical vulnerability in a router's CGI handler requires immediate attention. Given the device type and the nature of the exploit, infrastructure or network operations teams are likely responsible for its management and remediation. The first practical step is to identify all instances of the affected router model, confirm their network exposure, and determine business criticality before planning a response.

Infrastructure or network teams own this issue.
Verify router exposure and business criticality.
Plan coordinated vendor engagement or remediation.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is the Netcore NR289-GE device?

The Netcore NR289-GE is a networking hardware device, specifically a router, designed to manage internet traffic and connectivity for connected users. It utilizes a web-based management portal, which relies on CGI handlers to process administrative tasks and configuration changes through a browser interface.

How does CVE-2026-101072 trigger command injection?

This vulnerability, classified under CWE-77 and CWE-78, occurs when the device improperly handles input provided to the system. By sending a specially crafted request to the /ap_ip.cgi file, an attacker can supply malicious characters that the router's operating system interprets as part of a command, allowing the attacker to execute unauthorized instructions.

Do I need to be authenticated to trigger this vulnerability?

No, authentication is not required to trigger this flaw. The vulnerability allows an unauthenticated remote attacker to manipulate the 'ip' argument within the /ap_ip.cgi script. It is important to note that sending legitimate, properly formatted requests to the CGI handler does not trigger the bug; it only occurs when the input is specifically crafted to include malicious commands.

Is my network at risk from this router vulnerability?

If you use this router, your risk depends on its placement. According to Halo Surface Signal, this component is part of the management interface, which is often exposed on network edge devices. If the router's web management interface is reachable from the internet, it is more easily targeted by remote actors than a device restricted to a private, internal-only network.

What are the first steps to address this CVE?

Begin by creating an inventory of all Netcore NR289-GE devices within your environment to understand your footprint. Prioritize verifying if these devices have their management web interfaces exposed to the internet. Once located, assess the business criticality of those devices and coordinate with your network or infrastructure teams to plan for necessary security adjustments or isolation.

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.