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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.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Page title: MSI Router
  • Raw response body: GRAXE66, RadiX AXE6600

References

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