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CVE-2026-71984 – Unauthenticated OS Command Injection (RCE) – MSI Radix AXE6600 firmware v781521 and

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Summary

CVE-2026-71984 is an OS command injection vulnerability (CWE-78) in the MSI Radix AXE6600 Wi-Fi 6E router. The flaw resides in the router firmware’s urlfilter function and allows a remote, unauthenticated attacker to execute arbitrary commands with root privileges on the device. It is rated Critical.

Technical details

  • Root cause: The urlfilter function fails to properly sanitize user-supplied input before incorporating it into an OS command (CWE-78).
  • Trigger conditions: Exploitable remotely with no authentication and no user interaction; attack complexity is low.
  • Attack vector: Network.
  • Impact: Successful exploitation lets an attacker inject and execute arbitrary commands, obtaining root-level access and fully compromising the confidentiality, integrity, and availability of the device.

Affected software

  • MSI Radix AXE6600 router firmware version v781521 and earlier.

Severity

  • CVSS v3.1 base score: 9.8 (Critical) — vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
  • CVSS v4.0 base score: 9.3 (Critical) — vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N.

Mitigation and recommended actions

  • Immediate: Update the router firmware to version v782418 or later, available through MSI’s support portal.
  • If no patch can be applied: Restrict access to the router’s management interface to trusted networks, ensure remote/WAN-side administration is disabled, and place the device behind a firewall so the affected function cannot be reached from untrusted networks.

References

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