External risk intelligence

Vilo 5 Mesh WiFi Command Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.1)

CVE-2024-40089

The vulnerability affects a consumer mesh WiFi system. While these devices are network-connected, administrative configuration interfaces are typically restricted to the local area network or a dedicated mobile application, making direct public-internet-facing exposure of the vulnerable management function uncommon in standard deployments.

Command Injection

Viloliving Vilo 5 Firmware

5.16.1.33 and earlier

Halo Surface Signal: 2 out of 5 — less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A command injection vulnerability exists in a Vilo Mesh WiFi System, allowing authenticated attackers to execute arbitrary code by manipulating device names. This could potentially impact the system's integrity and confidentiality if exploited.

Attackers can run unauthorized commands.
Matters for device control and data protection.
Confirm relevance to confirm exposure.

Attack Path

How an attacker could exploit the issue

An attacker with authenticated access to the Vilo device's administration interface can exploit this vulnerability. By manipulating the device's name to include malicious shell commands, the attacker can trick the system into executing them. This could allow the attacker to gain control of the device and potentially execute arbitrary code.

Requires authenticated access to the device.
Injecting commands into the device name.
Arbitrary code execution and device compromise.

Live Threat

Current exploitation, exposure, and threat context

When supported by the advisory, remote authenticated attackers could execute arbitrary code on the Vilo 5 Mesh WiFi System by injecting shell commands into the device's name. This could allow an attacker to compromise the device's functionality.

System and user data may be affected.
Via authenticated access, injecting commands into the device name.
Arbitrary code execution could compromise the device.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in the Vilo 5 Mesh WiFi System requires an authenticated attacker to exploit, suggesting that network or security teams responsible for managing device access and authentication should investigate. The first practical step is to identify all deployed Vilo 5 devices, confirm their network exposure and business criticality, and then coordinate with the accountable owner for remediation planning.

Network/Security teams should own the issue.
Verify device network reachability and 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 Vilo 5 Mesh WiFi System?

The Vilo 5 is a consumer-grade wireless networking product designed to provide whole-home internet coverage. It uses a mesh topology, where multiple units work together to create a single, seamless WiFi network. This firmware manages the device's core networking functions, routing, and administrative settings through a control interface.

How does CVE-2024-40089 command injection work?

This vulnerability, classified as CWE-77 (Improper Neutralization of Special Elements used in an OS Command), occurs when a system processes input without properly filtering dangerous characters. In this case, the Vilo 5 firmware incorrectly handles shell commands inserted into the device name field. Instead of treating the name as simple text, the system executes the hidden malicious commands, granting an attacker unintended control over the device.

What is required to trigger this vulnerability?

Exploitation requires the attacker to have authenticated access to the device's administrative interface. Simply being on the same network or having the WiFi password is not sufficient on its own if the attacker cannot reach the management functions. The vulnerability does not trigger through standard network traffic or routine usage; it specifically requires submitting malicious input into the device naming configuration.

Why does Halo Surface Signal categorize this as unlikely?

Halo Surface Signal notes that while the Vilo 5 is network-connected, its administrative management interfaces are generally not designed to be reachable from the public internet. Most deployments restrict access to the local area network or specific mobile applications. Because the management function is rarely exposed to the wide-area network, the actual surface area available for an attacker to reach this interface is typically very limited.

Do I need to update my Vilo 5 devices?

Your first step is to create an inventory of all Vilo 5 units currently in use within your environment. Once identified, verify if they are running firmware version 5.16.1.33 or earlier. Since this flaw requires authenticated access, focus on confirming which devices are reachable over the network and determining if access controls are effectively secured. Coordinate with the device owners to plan for firmware updates as they become available.

References

github.com/byu-cybersecurity-research/vilo/blob/main/vulns/CVE-2…

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.