CVE-2026-6131 — AI Deep Analysis Summary

🚨 **Essence**: OS Command Injection in TOTOLINK A7100RU. 📉 **Consequences**: Attackers can execute arbitrary system commands. This leads to total device compromise, data theft, and network disruption.…

🛡️ **Root Cause**: CWE-78 (OS Command Injection). 🐛 **Flaw**: Improper handling of the `command` parameter in `/cgi-bin/cstecgi.cgi`.…

📦 **Affected Product**: TOTOLINK A7100RU Wireless Router. 🏭 **Vendor**: TOTOLINK (China). 📜 **Specific Version**: Firmware 7.4cu.2313_b20191024. ⚠️ **Scope**: Only this specific firmware build is confirmed vulnerable.

💀 **Privileges**: Full System Control. 🕵️ **Data Access**: High Confidentiality & Integrity impact. 🌐 **Capabilities**: Hackers can run any OS command.…

⚡ **Threshold**: LOW. 🔓 **Auth**: None Required (PR:N). 🌍 **Access**: Network Accessible (AV:N). 🚫 **UI**: No User Interaction needed (UI:N). 📉 **Complexity**: Low (AC:L). This is a remote, unauthenticated exploit.…

🔍 **Public Exploit**: Yes. 📂 **Source**: GitHub repository (Litengzheng/vuldb_new). 📝 **Details**: VDB-356995 provides technical descriptions and indicators.…

🔎 **Self-Check**: Scan for `/cgi-bin/cstecgi.cgi` endpoints. 🧪 **Test**: Send crafted HTTP requests with the `command` parameter containing shell metacharacters (e.g., `;`, `|`).…

🛠️ **Official Patch**: Not explicitly listed in the provided data. 📢 **Advisory**: Third-party advisory exists (Submit #792251). 🏢 **Action**: Check TOTOLINK official website (totolink.net) for firmware updates.…

🚧 **Workaround**: Block external access to the router's management interface (WAN side). 🚫 **Filter**: Implement strict firewall rules to prevent unauthenticated access to `/cgi-bin/cstecgi.cgi`.…

🔥 **Urgency**: CRITICAL. 🚨 **Priority**: Immediate Action Required. 📉 **Risk**: CVSS 9.8 (Critical). 🛑 **Reason**: Unauthenticated, remote code execution on IoT devices.…