CVE-2026-7241 — AI Deep Analysis Summary

🚨 **Essence**: Critical OS Command Injection in TOTOLINK A8000RU. <br>💥 **Consequences**: Attackers can execute arbitrary system commands, leading to total device compromise, data theft, and network takeover.

🛡️ **Root Cause**: CWE-78 (OS Command Injection). <br>🔍 **Flaw**: The `setWiFiBasicCfg` function in `/cgi-bin/cstecgi.cgi` fails to sanitize the `wifiOff` parameter, allowing malicious shell commands to be injected.

📦 **Affected Product**: TOTOLINK A8000RU Wireless Router. <br>📅 **Specific Version**: Firmware 7.1cu.643_b20200521. <br>🏢 **Vendor**: TOTOLINK (China Jion Electronics).

👑 **Privileges**: Full System Control (Root/High Privileges). <br>📊 **Data Impact**: High Confidentiality, Integrity, and Availability loss.…

⚡ **Threshold**: LOW. <br>🔓 **Auth**: No Authentication Required (PR:N). <br>🌐 **Access**: Network Accessible (AV:N). <br>🎯 **Complexity**: Low (AC:L). Easy to exploit remotely.

💣 **Public Exploit**: Yes. <br>📂 **Source**: GitHub PoC available (Litengzheng/vuldb_new2). <br>🔗 **Details**: VDB-359848 contains technical descriptions and indicators of compromise.

🔍 **Self-Check**: Scan for the specific CGI endpoint: `/cgi-bin/cstecgi.cgi`. <br>🧪 **Test**: Attempt to inject commands via the `wifiOff` parameter in the `setWiFiBasicCfg` function.…

🩹 **Official Fix**: Not explicitly detailed in the provided data, but vendors typically release patches. <br>⚠️ **Status**: Check TOTOLINK official website for firmware updates beyond version 7.1cu.643_b20200521.

🛑 **Workaround**: Block external access to the router's management interface (WAN side). <br>🚫 **Filter**: Implement WAF rules to block shell metacharacters (`;`, `|`, `&`) in requests to `/cgi-bin/cstecgi.cgi`.

🔥 **Urgency**: CRITICAL. <br>📈 **Priority**: Immediate Action Required. <br>📉 **CVSS**: 9.8 (Critical). <br>🚀 **Action**: Isolate affected devices, apply patches, or restrict network access immediately.