Command Injection in MSI Radix Router ALG Function

MSI Radix AXE6600 router firmware version v781521 contains a command injection vulnerability in the alg 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.

Casky was already ahead

This CVE exploits attack patterns that Casky's 446matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

CVE-2026-71987 is a critical command injection vulnerability (CWE-78) affecting MSI Radix AXE6600 routers running firmware version v781521. The flaw exists in the alg function, where insufficient input validation allows remote attackers to inject and execute arbitrary operating system commands without authentication. This is particularly dangerous because routers serve as network perimeter devices—compromise of a router gives attackers a foothold in the network, enabling them to pivot toward internal systems, intercept traffic, and establish persistence. Small businesses and home networks using this router model are directly at risk, along with any organization with these devices in their infrastructure.

Casky's 446 matching skills leverage Claude AI's extended reasoning to correlate attack patterns across MITRE ATT&CK techniques TA0001 (Reconnaissance), TA0043 (Reconnaissance—alternative mapping), and TA0002 (Resource Development). Practitioners using Casky would observe detection findings aligned with command injection indicators: suspicious alg function calls containing shell metacharacters, unexpected process spawning from router daemons, and privilege escalation attempts to root. The platform's skill set enables detection of the exploitation chain—from initial reconnaissance probing the router's web interface, through payload delivery in the alg parameter, to post-exploitation command execution. Security teams would see correlated signals showing remote network access to the router followed by suspicious process execution patterns, giving them the context needed to isolate affected devices before attackers establish persistence or lateral movement.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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446 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-71987.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

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abusing-dpapi-for-credential-access

red teaming · high

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abusing-shadow-credentials-for-privesc

red teaming · high

Run

MITRE ATT&CK Techniques

TA0001 TA0043 TA0002

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