CVE-2026-71988 in Radix AXE6600
Summary
by MITRE • 08/09/2026
MSI Radix AXE6600 router firmware version v781521 contains a command injection vulnerability in the portFw function that allows remote attackers to execute arbitrary commands on the affected device. Attackers can exploit this vulnerability through the alg function to execute malicious commands and obtain root privileges on the underlying system.
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Analysis
by VulDB Data Team • 08/09/2026
The vulnerability under examination involves a command injection flaw within the MSI Radix AXE6600 router firmware version v781521, specifically within the portFw function that operates in the context of the alg function. This represents a critical security weakness that enables remote attackers to execute arbitrary commands on the affected device, fundamentally compromising the system's integrity and security posture. The flaw resides in how user-supplied input is processed and incorporated into system commands without proper sanitization or validation.
The technical mechanism behind this vulnerability stems from inadequate input validation within the portFw function, which directly incorporates untrusted data into shell commands executed by the underlying operating system. When an attacker manipulates parameters passed to the alg function, the system fails to properly escape or filter special characters that could alter command execution flow. This allows malicious payloads to be injected and executed with the privileges of the affected service account, typically escalating to root access due to the router's default administrative privileges. The vulnerability aligns with CWE-77 and CWE-94 categories, representing command injection and code injection respectively, while also mapping to ATT&CK technique T1059.001 for command and script execution through legitimate system interfaces.
The operational impact of this vulnerability extends beyond simple remote code execution, as successful exploitation provides attackers with complete control over the router's functionality and underlying system. Attackers can manipulate network traffic routing, modify firewall rules, access sensitive configuration data, and potentially use the compromised device as a pivot point for attacking internal network resources. The remote nature of the exploit means that adversaries do not require physical access or local network presence to conduct attacks, making this vulnerability particularly dangerous in enterprise environments where routers serve as critical network infrastructure components.
Mitigation strategies should begin with immediate firmware updates from MSI addressing the identified command injection flaw, while network administrators implement additional protective measures such as restricting remote administrative access to the device and monitoring for suspicious command execution patterns. Network segmentation and firewall rules should be configured to limit communication with the affected router to authorized management systems only, reducing potential attack surface. Organizations should also consider implementing intrusion detection systems capable of identifying anomalous command execution patterns and establishing regular vulnerability assessment procedures to identify similar weaknesses in network infrastructure devices. The remediation process must include thorough testing of updated firmware to ensure that security patches do not introduce compatibility issues with existing network configurations while maintaining continuous monitoring for potential exploitation attempts against this and similar vulnerabilities across the enterprise network infrastructure.