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CVE-2026-101075 – Unauthenticated OS Command Injection – Netcore NR289-GE 1.4.5102

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Summary

CVE-2026-101075 is a critical unauthenticated OS command injection vulnerability in the Netcore NR289-GE router, version 1.4.5102. The flaw exists in the Location Time Handler component (/location_time.cgi) and allows a remote, unauthenticated attacker to execute arbitrary operating system commands on the device. The vulnerability has been assigned a maximum CVSS v3.1 base score of 10.0 (Critical), and a public proof-of-concept exploit is available.

Technical details

  • Root cause: The system function in /location_time.cgi (Location Time Handler component) fails to properly neutralize the mac request parameter before passing it to a system command execution call (CWE-78: OS Command Injection).
  • Trigger conditions: An attacker sends a crafted HTTP request to the /location_time.cgi endpoint with a malicious value in the mac parameter; no valid session or credentials are required.
  • Attack vector: Network-based, low complexity, no privileges or user interaction required — the endpoint is reachable over the network/WAN-facing management interface.
  • Impact: Successful exploitation results in arbitrary command execution on the router with full compromise of confidentiality, integrity, and availability (device takeover, traffic interception, pivoting into the internal network).

Affected software

  • Netcore NR289-GE — firmware version 1.4.5102

Severity

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

Mitigation and recommended actions

  • Immediate: No official vendor patch is available at this time; the vendor was contacted but has not responded to the disclosure.
  • Workarounds/network mitigations:
    • Disable remote/WAN access to the router’s web management interface, including the /location_time.cgi endpoint, and restrict administrative access to trusted internal networks only.
    • Place management interfaces behind a VPN or firewall rule set that blocks unsolicited inbound connections.
    • Monitor for unusual outbound connections or command execution originating from affected devices.
    • Given the lack of vendor response, organizations should evaluate replacing affected devices with actively supported alternatives if long-term risk cannot be mitigated.

References

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