External risk intelligence

TOTOLINK X6000R Remote Command Execution Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2023-50651

The affected product is a wireless router, a device designed to serve as an internet edge gateway. The vulnerability exists in the CGI interface, which is a network-accessible component typically exposed on such devices for management and configuration purposes, often reachable from the internet.

OS Command Injection

Totolink X6000r Firmware

9.4.0cu.852_b20230719

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

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A vulnerability has been identified in a networking device that could allow unauthorized remote access and control. This type of exposure, if exploited, could potentially impact the security and availability of the network infrastructure. The primary concern is to confirm if this specific device is in use and assess any related exposure.

  • Allows remote control of network devices.
  • Routers are internet-facing, making them a target.
  • Verify if this device is in your network.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending a specially crafted request to the router's network interface. This would involve targeting the web-based management interface, specifically the `/cgi-bin/cstecgi.cgi` component. If successful, this could allow an unauthenticated attacker to execute arbitrary commands on the device.

  • Network access required.
  • Vulnerable CGI endpoint triggered.
  • Full device compromise possible.

Live Threat

Current exploitation, exposure, and threat context

A remote command execution vulnerability in the CGI interface of the router could allow an unauthenticated attacker to run arbitrary commands on the device when supported by the advisory. This could impact the router's ability to function as intended and potentially affect network traffic.

  • Router firmware and network traffic.
  • Unauthenticated network access to CGI interface.
  • Disruption of network services and control.

Operational Fix

Recommended remediation, mitigation, and detection steps

The presence of a critical remote command execution vulnerability in the TOTOLINK X6000R firmware suggests that the infrastructure or network security teams are likely responsible for managing and securing this device, potentially in coordination with a vendor management team if the device was procured through a third party. The immediate priority is to identify all instances of this device across the environment, assess their exposure to external networks, and determine business criticality to prioritize remediation efforts.

  • Infrastructure or network security teams own the issue.
  • Verify device exposure and business criticality.
  • Plan coordinated remediation or vendor engagement.

Supplementary metadata

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.

Frequently asked questions

What is the TOTOLINK X6000R?

The TOTOLINK X6000R is a wireless router designed to serve as an internet edge gateway for homes or small offices. It manages network traffic, provides Wi-Fi connectivity, and allows users to configure settings through a built-in web management interface.

What does this CVE-2023-50651 vulnerability mean?

This is a Remote Command Execution (RCE) vulnerability, classified as CWE-78 (OS Command Injection). It means an attacker can force the device to execute unauthorized system commands. By sending malicious input to the router, an attacker could potentially gain full control over the device's operating system without needing a password.

How is this vulnerability triggered?

An attacker triggers the vulnerability by sending a specially crafted request to the router's web management interface, specifically targeting the /cgi-bin/cstecgi.cgi component. Simply visiting the device's standard landing page or using basic internet features does not trigger the bug; it requires a targeted, malformed network request to that specific CGI interface.

Why is this a high-risk issue?

According to Halo Surface Signal, this router is an internet edge gateway, meaning its management interface is often reachable from the internet. Because the vulnerability is accessible remotely without authentication, any X6000R device directly connected to a public network is at a significantly higher risk of compromise compared to devices strictly isolated on an internal network.

Do I need to take action if I use this router?

Yes. First, inventory your network to confirm if you are running the affected X6000R firmware version. Once identified, evaluate whether the device management interface is accessible from the internet. Prioritize limiting access to the device settings, restrict management traffic to local connections, and coordinate with your internal IT team or the vendor to plan for firmware updates or replacements.

References