External risk intelligence

Tenda i29 Command Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2023-50989

The Tenda i29 is a wireless access point. Network infrastructure devices like access points are commonly deployed in configurations where their management interfaces or web-based administrative consoles are reachable via the network, and while often intended for internal use, they are frequently exposed or accessible in environments where they serve as edge or gateway hardware.

Command Injection

Tenda I29 Firmware

1.0.0.21.0.0.5

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 Tenda i29 network devices, specifically related to a command injection flaw in the pingSet function. This vulnerability could allow unauthorized parties to execute arbitrary commands on affected devices.

Remote attackers can inject commands.
Critical flaw affects network infrastructure.
Confirm relevance and exposure of devices.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted network requests to the device's management interface. This exposure allows for the execution of arbitrary commands on the affected device.

Attacker needs network access.
Triggered via the pingSet function.
Leads to code execution and device compromise.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to execute arbitrary commands on the device over the network when the `pingSet` function is triggered. This could affect the device's normal operation and potentially its security configuration.

Device command execution.
Network-accessible function call.
Service disruption and unauthorized control.

Operational Fix

Recommended remediation, mitigation, and detection steps

For the Tenda i29, the infrastructure or platform team responsible for network devices likely owns this vulnerability. The immediate first step is to identify all deployed i29 devices, determine their network exposure and business criticality, and then assign an owner for remediation planning.

Network infrastructure teams should own the issue.
Verify device network exposure and criticality first.
Plan remediation based on identified risk.

Supplementary metadata

CVSS vector

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Frequently asked questions

What is the Tenda i29?

The Tenda i29 is a wireless access point. These devices are fundamental network infrastructure used to provide Wi-Fi connectivity. Because they act as bridges between wireless clients and the wired network, they are often placed in prominent positions within a building's architecture to maximize signal coverage.

What does CVE-2023-50989 mean by command injection?

This vulnerability, classified as CWE-77 (Improper Neutralization of Special Elements used in an OS Command), means the device fails to properly sanitize input. An attacker can send malicious data that the device mistakes for a legitimate system instruction. Instead of just performing a task, the device executes the attacker's hidden command, effectively granting them unauthorized control over the system's functions.

How is this command injection triggered?

The vulnerability is triggered by sending specially crafted network requests that interact with the device's pingSet function. This function is intended for diagnostic purposes, such as testing connectivity. Importantly, simply having the device powered on or connected to the network is not enough; an attacker must specifically target this function with malicious input to initiate the unauthorized command execution.

Do I need to worry if my Tenda i29 is internal?

Yes, it is relevant to consider. While many assume access points are isolated, Halo Surface Signal notes that these devices are frequently deployed in ways that make their management interfaces reachable via the network. Even if not directly on the open internet, any attacker who gains a foothold on your local network could potentially reach and exploit the administrative interface of these devices.

What is the first step if I use Tenda i29 devices?

Start by identifying every Tenda i29 unit currently deployed in your environment. Once you have a complete inventory, assess how each device is connected and determine which teams are responsible for managing them. Prioritize understanding the network reachability of these devices, as this helps you determine which units face the greatest risk and need to be included in your remediation plan.

References

tenda.com/

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.