External risk intelligence

SDMC NE6037 Router Hardcoded Password Allows Unauthenticated Root Access.

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-24444

The vulnerability exists in the web management interface of a cable modem router. These devices are designed to be internet edge gateways, and management interfaces on such customer premises equipment are frequently exposed or reachable via the wide area network or local network, making them highly accessible to potential attackers.

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 SDMC cable modem routers that allows unauthenticated attackers to gain root access. This exploit could potentially lead to unauthorized remote control of these devices.

Hardcoded password allows unauthorized root access.
Exposed internet edge devices are a high-risk target.
Confirm relevance and scope of affected devices.

Attack Path

How an attacker could exploit the issue

An attacker can reach the vulnerable component by accessing the cable modem router's web management interface over HTTP. Exploiting this involves sending a request to specific recovery endpoints within this interface, where a hardcoded password can be submitted without prior authentication. Successfully leveraging this allows an attacker to gain root access and enable remote command execution services, potentially leading to full system compromise.

Entry condition: Network access to the router.
Trigger point: Recovery endpoints in the management interface.
Resulting risk: Unauthenticated root-level remote access.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to gain root access to affected cable modem routers by leveraging a hardcoded password in the web management interface recovery endpoints. This could enable remote access to the underlying system when the SSH and Telnet services are enabled.

Root access to the router system.
Via unauthenticated web interface recovery.
Unauthorized remote system access.

Operational Fix

Recommended remediation, mitigation, and detection steps

The SDMC NE6037 cable modem routers contain a critical hardcoded password vulnerability. This issue likely falls under the responsibility of the Infrastructure or Network Operations teams, as they typically manage edge devices and network access. The first practical step is to identify all deployed NE6037 devices, confirm their network exposure and business criticality, and then assign ownership for remediation.

Infrastructure or Network Operations teams own this.
Verify device exposure and business criticality.
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 the SDMC NE6037 device affected by CVE-2026-24444?

The SDMC NE6037 is a cable modem router used to provide internet connectivity to homes and businesses. These devices act as gateways between a service provider's network and a local user environment, typically managing traffic routing and security functions at the edge of the network.

How does this hardcoded password vulnerability work in CVE-2026-24444?

This vulnerability is classified as CWE-798, which involves the use of hardcoded credentials. In this specific case, the router's web management interface contains recovery endpoints that accept a fixed, hidden password. Because this credential is embedded in the software, it bypasses standard login security, allowing anyone who knows it to authenticate as the root system administrator.

What triggers this security flaw in the SDMC router?

An attacker triggers the vulnerability by sending a specially crafted HTTP request to specific recovery scripts (mgmt.php or npcmd.php) on the router's web management interface. Successful exploitation requires network reachability to these endpoints. The bug is not triggered by standard traffic passing through the router, only by interacting directly with the management interface itself.

Why is this CVE considered relevant to my network?

Halo Surface Signal indicates this is a high-risk issue because the affected web management interface is often reachable over the network. As an edge device, the router is intended to sit between the internet and your internal systems. If the interface is accessible from the WAN or local network, an attacker could remotely gain administrative control over the entire system.

What should I do if I am running these SDMC devices?

Begin by creating an inventory of all SDMC NE6037 routers currently deployed in your environment. Evaluate each device to determine if its management interface is exposed to the internet or accessible from untrusted network segments. Once identified, coordinate with your network or infrastructure team to restrict access to these management interfaces and prioritize a plan for applying vendor-provided firmware updates.

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.