External risk intelligence

Edimax RE11S Command Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2025-22912

This command injection vulnerability affects the Edimax RE11S, a network-connected Wi-Fi range extender. Because these devices are typically managed via a web interface accessible over the local network and often exposed to network traffic for routing or bridging functions, the administrative interface is frequently reachable, increasing the likelihood of exposure.

Command Injection

Edimax Re11s Firmware

1.11

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 command injection vulnerability has been identified in RE11S firmware, a type of network device. This issue allows for unauthorized commands to be executed remotely, potentially impacting the device's operation and security. The main concern is confirming its relevance and exposure within our environment.

Issue: Unauthorized commands can be run on network devices.
Why remember: Remote execution creates significant security risks.
Executive takeaway: Confirm exposure and assess potential impact.

Attack Path

How an attacker could exploit the issue

Attackers can reach the RE11S firmware through its network interface, leveraging an exposed web administration component. A crafted request to the `/goform/formAccept` endpoint can allow an attacker to inject and execute arbitrary commands on the device. This could lead to a complete compromise of the device's functionality and potentially the network it's connected to.

No authentication required for access.
Web interface command injection.
Complete device compromise.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to execute arbitrary commands on the affected device when an administrative interface is reachable. The device's ability to process network traffic may be compromised.

System commands could be executed.
Network access allows command injection.
Device function and data may be impacted.

Operational Fix

Recommended remediation, mitigation, and detection steps

Given the network-accessible nature of the Edimax RE11S, platform and infrastructure teams are likely responsible for managing these devices. The first practical step is to confirm the presence of affected devices, assess their reachability and business criticality, identify the accountable owner, and then plan remediation based on the identified risk.

Own by platform and infrastructure teams.
Verify device presence and reachability.
Plan remediation based on risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is the Edimax RE11S?

The Edimax RE11S is a Wi-Fi range extender. Its primary function is to capture and rebroadcast existing wireless signals to improve network coverage in larger homes or offices. Because it bridges network traffic, it maintains an integrated web interface that allows users to configure settings and manage connections directly through a browser.

What does command injection mean for CVE-2025-22912?

This vulnerability falls under the Weakness Class CWE-77, which involves improper neutralization of special elements used in a command. In plain English, the device fails to properly filter instructions sent to it. Consequently, an attacker can input unauthorized system commands into the affected component, tricking the device into executing those commands as if they were legitimate internal instructions.

How does an attacker trigger this vulnerability?

An attacker triggers the vulnerability by sending a specifically crafted network request to the device's /goform/formAccept endpoint. Notably, this process does not require the attacker to have valid login credentials or prior access to the device's administrative account. Simply reaching this specific web interface endpoint with the malicious payload is sufficient to execute the unauthorized commands.

Is my device at risk based on Halo Surface Signal?

Halo Surface Signal indicates the RE11S is likely to be exposed because these devices are inherently network-connected. Since they are designed to bridge traffic and are often managed via a web interface, the administrative component is frequently reachable across the local network. If your extender is accessible from other segments of your network, the risk of unauthorized interaction increases.

What should I do if I use this Edimax product?

First, conduct an inventory to identify if you have the RE11S model running the affected firmware version. Once identified, evaluate how these devices are positioned within your network and determine if they are accessible from untrusted areas. Consult the official Edimax support channels to verify if a firmware update is available to resolve this vulnerability and plan your update schedule based on the device's importance.

References

www.edimax.com/edimax/global/

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.