External risk intelligence

Tenda TX9 Firmware Stack Overflow Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2024-51315

This vulnerability affects a wireless router's firmware through a web-based form (/goform/SetOnlineDevName). Routers are edge devices commonly deployed as internet-facing gateways, making their management interfaces or web-based configuration endpoints reachable from the network.

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

This critical vulnerability affects Tenda wireless router firmware, specifically in how it handles device name configurations. Because these routers often serve as the gateway to an organization's network, a flaw here could allow unauthorized access or disruption. The main concern is confirming if this specific technology is deployed within the organization and assessing its exposure.

A router configuration flaw poses a network access risk.
Leadership should remember this for network edge security.
Confirm relevance and exposure to potential network risks.

Attack Path

How an attacker could exploit the issue

An attacker could reach a vulnerable component on a Tenda router by sending a specially crafted request to its web interface. This request targets a function within the router's firmware that handles device naming. If successful, the vulnerability could lead to critical security issues, including the compromise of confidentiality, integrity, and availability of the affected device.

Accessible via the network.
Triggered through the web interface.
Leads to full system compromise.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an attacker to execute arbitrary code on the Tenda TX9 router, potentially leading to unauthorized access or denial of service. The impact could be a compromise of network security and exposure of sensitive information.

Network device compromised
Remote code execution possible
Sensitive information exposure

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability impacts Tenda TX9 V22.03.02.20 firmware. Teams responsible for network edge devices and device firmware management, such as infrastructure or network security teams, should prioritize this. The first step is to identify all deployed Tenda TX9 devices, confirm their network exposure and business criticality, and then coordinate with the device owners for remediation.

Network or infrastructure teams own resolution.
Verify device presence and exposure.
Plan for firmware update deployment.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is the Tenda TX9 and where is it used?

The Tenda TX9 is a wireless router used to provide network connectivity. It acts as a gateway device, managing data traffic between local devices and the internet. Because it handles routing and configuration, it is often placed at the edge of a network infrastructure to facilitate home or small office connectivity.

What does a stack overflow vulnerability mean in CVE-2024-51315?

This vulnerability is classified as CWE-121, or stack-based buffer overflow. It occurs when the router's software tries to store more data in a temporary memory area, called the stack, than it is designed to hold. This overflow can overwrite adjacent memory, potentially allowing an attacker to corrupt the system's execution flow or run unauthorized code.

How is this Tenda firmware vulnerability triggered?

The flaw is triggered by sending a specially crafted network request to the router's web interface, specifically targeting the SetOnlineDevName function. It does not require local physical access or user interaction. Importantly, simply having the router powered on without an active request sent to this specific form does not trigger the vulnerability.

Is my network at risk from CVE-2024-51315?

Halo Surface Signal indicates that because this router operates as an internet-facing gateway, its web-based configuration endpoints are often reachable from the network. If your Tenda TX9 device is configured to allow access to its web management interface from the wider network or the internet, it is at higher risk of being targeted by this flaw.

What should I do if I use Tenda TX9 devices?

First, conduct an inventory to locate all Tenda TX9 devices running firmware version V22.03.02.20 in your environment. Prioritize those that are accessible from external networks. Confirm the business criticality of these devices and consult official Tenda support resources to determine if a firmware update is available to address the vulnerability.

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.