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CVE-2026-102240 – Unauthenticated OS Command Injection (RCE) – Netcore NAP930 0.1.241010.141410

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Summary

CVE-2026-102240 is a critical, unauthenticated OS command injection vulnerability in the Network Tools CGI component of the Netcore NAP930 wireless access point running firmware version 0.1.241010.141410. The flaw allows a remote, unauthenticated attacker to execute arbitrary operating system commands on the device. It carries a CVSS v3.1 base score of 10.0 (Critical), and public exploit code is available.

Technical details

  • Root cause: The eval function within /www/cgi-bin/network_tools (the Network Tools CGI handler) fails to sanitize user-supplied input before passing it to a system command execution routine.
  • Trigger condition: An attacker submits a crafted value in the sid parameter to the network_tools CGI endpoint; the unsanitized value is passed into a command execution context, resulting in OS command injection.
  • Attack vector: Network — the endpoint is reachable remotely, requires no authentication, no privileges, and no user interaction.
  • Impact: Successful exploitation results in complete compromise of confidentiality, integrity, and availability of the device, allowing arbitrary command execution with the privileges of the CGI process (full device takeover).

Affected software

  • Netcore NAP930, firmware version 0.1.241010.141410 (Network Tools CGI component)

Severity

  • CVSS v3.1 Base Score: 10.0 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: No vendor patch is currently available. Netcore was notified of the disclosure but has not responded or released a fixed firmware version. Check the vendor’s support site periodically for an updated firmware release and apply it as soon as one is published.
  • Network mitigations (if no patch is available):
    • Do not expose the device’s web management or CGI interfaces (including /www/cgi-bin/network_tools) directly to the internet.
    • Restrict access to the device’s management interface to trusted internal networks only, using firewall rules or network segmentation.
    • Disable remote/WAN-side administration features if enabled.
    • Monitor device logs and network traffic for anomalous requests to network_tools or unexpected outbound connections that could indicate command injection attempts.
    • Consider replacing or isolating affected devices if they cannot be adequately restricted from untrusted network access.

References

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