External risk intelligence

Tenda W18E Account Module Code Execution Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2025-45343

The affected product is a Tenda W18E router, which is commonly deployed as an internet-facing gateway device. Because the vulnerability exists within the management interface, and such interfaces are often accessible from the WAN side or intended for administrative access, the attack surface is considered likely to be reachable from the internet.

Tenda W18e Firmware

16.01.0.11\(2044\)

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

An unauthenticated attacker could potentially execute arbitrary code on affected Tenda devices through a vulnerability in the account module's editing functionality. This critical vulnerability, rated at 9.8, allows for remote code execution without requiring any privileges or user interaction, posing a significant security risk. The primary concern for leadership is to confirm if these specific devices are in use within the organization's network.

Remote code execution vulnerability found.
Critical flaw impacts internet-facing devices.
Confirm device presence and assess exposure.

Attack Path

How an attacker could exploit the issue

An attacker can reach the vulnerable editing functionality through the device's account module, potentially over the network without needing any special access. By sending a crafted request to a specific route, an attacker could execute arbitrary code on the device.

Accessible over the network.
Triggered via account editing functionality.
Leads to arbitrary code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to execute arbitrary code on a Tenda W18E router through its account editing functionality. This could occur when the device's management interface is accessible, potentially impacting its core functions and any services routed through it.

Router code execution.
Via account editing functionality.
Potential denial of service.

Operational Fix

Recommended remediation, mitigation, and detection steps

Real-world ownership for this vulnerability likely falls to teams managing network infrastructure and edge devices. The first practical step is to identify all Tenda W18E devices, determine their exposure to the internet or untrusted networks, and confirm their criticality to business operations. Once identified and prioritized, responsible teams can coordinate remediation efforts, which may involve vendor engagement or the implementation of temporary risk-reduction measures.

Network infrastructure teams own remediation.
Verify device exposure and criticality first.
Plan coordinated maintenance and vendor outreach.

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 Tenda W18E?

The Tenda W18E is a router designed for small to medium business environments, often used to manage network traffic, provide Wi-Fi connectivity, and enforce security policies. It acts as a gateway device, connecting local network users to the internet while offering administrative tools for managing system settings and user accounts.

What does CVE-2025-45343 mean for the device security?

This vulnerability is classified under Improper Access Control (CWE-284). It means the device fails to properly restrict access to its internal account management functions. An attacker can exploit this weakness to bypass standard security checks and execute unauthorized, arbitrary code on the router's operating system, effectively taking control of the device functions.

How can an attacker trigger this vulnerability?

An attacker triggers this flaw by sending a specifically crafted network request to the device's 'goform/setmodules' route, which handles account modifications. The vulnerability requires no user interaction or authentication to initiate. It is not triggered by standard web browsing activity or legitimate administrative logins, but rather by malicious interaction with this specific management path.

Why is the Tenda W18E considered at risk according to Halo Surface Signal?

Halo Surface Signal identifies the Tenda W18E as having a 'Likely' reachability score because this model is commonly deployed as an internet-facing gateway. Since the vulnerable account management interface is often reachable from the WAN side, an attacker on the public internet may be able to interact with the device directly, increasing the potential for remote exploitation.

What should I do if I manage Tenda W18E routers?

Your first step is to create an inventory of all Tenda W18E devices in your environment to understand where they are deployed. Prioritize verifying if these devices are exposed to the internet. Once you have identified these systems, assess their criticality to your operations and coordinate with your infrastructure team to plan for vendor-provided updates or risk-reduction strategies.

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.