CVE-2026-6025 — AI Deep Analysis Summary

Q: What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: OS Command Injection in TOTOLINK A7100RU. 💥 **Consequences**: Attackers can execute arbitrary system commands on the router, leading to total device compromise.

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: CWE-78 (OS Command Injection). 🐛 **Flaw**: Improper handling of the `enable` parameter in `/cgi-bin/cstecgi.cgi`. Malicious input bypasses validation and executes directly.

Q: Who is affected? (Versions/Components)

📦 **Affected Product**: TOTOLINK A7100RU Router. 📅 **Vulnerable Version**: Firmware 7.4cu.2313_b20191024. ⚠️ **Vendor**: Totolink (China Jion Electronics).

Q: What can hackers do? (Privileges/Data)

👑 **Privileges**: Full System Control. 📂 **Data**: High Impact (C:H/I:H/A:H). Hackers can read/write files, modify configs, and potentially pivot to internal network devices.

Q: Is exploitation threshold high? (Auth/Config)

🔓 **Threshold**: LOW. 🌐 **Auth**: None Required (PR:N). 📡 **Access**: Network (AV:N). 🎯 **Complexity**: Low (AC:L). Any user on the network can exploit this without credentials.

Q: Is there a public Exp? (PoC/Wild Exploitation)

💻 **Public Exploit**: YES. 🔗 **Source**: GitHub (Litengzheng/vuldb_new) and VDB-356601. 📝 **Status**: Technical descriptions and PoCs are available online.

Q: How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for `/cgi-bin/cstecgi.cgi`. 🧪 **Test**: Send crafted requests with the `enable` parameter containing shell metacharacters (e.g., `;`, `|`). 📊 **Tool**: Use Nmap scripts or custom Python PoCs.

Q: Is it fixed officially? (Patch/Mitigation)

🩹 **Patch**: Check Totolink official site. 📢 **Advisory**: VDB-356601 and GitHub README provide details. ⏳ **Note**: Published 2026-04-10; verify if vendor has released a fixed firmware version.

Q: What if no patch? (Workaround)

🚧 **Workaround**: Block external access to the router's management interface. 🛑 **Mitigation**: Disable remote management features. 📵 **Network Segmentation**: Isolate IoT devices from critical network segments.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: CRITICAL. 📈 **Priority**: P1. CVSS Score is 9.8 (Critical). Immediate action required due to zero-auth exploitation and high impact on device integrity.

Updated May 06, 2026 CVSS 9.8 · Critical

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: OS Command Injection in TOTOLINK A7100RU. 💥 **Consequences**: Attackers can execute arbitrary system commands on the router, leading to total device compromise.

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: CWE-78 (OS Command Injection). 🐛 **Flaw**: Improper handling of the `enable` parameter in `/cgi-bin/cstecgi.cgi`. Malicious input bypasses validation and executes directly.

Q3Who is affected? (Versions/Components)

📦 **Affected Product**: TOTOLINK A7100RU Router. 📅 **Vulnerable Version**: Firmware 7.4cu.2313_b20191024. ⚠️ **Vendor**: Totolink (China Jion Electronics).

Q4What can hackers do? (Privileges/Data)

👑 **Privileges**: Full System Control. 📂 **Data**: High Impact (C:H/I:H/A:H). Hackers can read/write files, modify configs, and potentially pivot to internal network devices.

Q5Is exploitation threshold high? (Auth/Config)

🔓 **Threshold**: LOW. 🌐 **Auth**: None Required (PR:N). 📡 **Access**: Network (AV:N). 🎯 **Complexity**: Low (AC:L). Any user on the network can exploit this without credentials.

Q6Is there a public Exp? (PoC/Wild Exploitation)

💻 **Public Exploit**: YES. 🔗 **Source**: GitHub (Litengzheng/vuldb_new) and VDB-356601. 📝 **Status**: Technical descriptions and PoCs are available online.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for `/cgi-bin/cstecgi.cgi`. 🧪 **Test**: Send crafted requests with the `enable` parameter containing shell metacharacters (e.g., `;`, `|`). 📊 **Tool**: Use Nmap scripts or custom Python PoCs.

Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Patch**: Check Totolink official site. 📢 **Advisory**: VDB-356601 and GitHub README provide details. ⏳ **Note**: Published 2026-04-10; verify if vendor has released a fixed firmware version.

Q9What if no patch? (Workaround)

🚧 **Workaround**: Block external access to the router's management interface. 🛑 **Mitigation**: Disable remote management features. 📵 **Network Segmentation**: Isolate IoT devices from critical network segments.

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: CRITICAL. 📈 **Priority**: P1. CVSS Score is 9.8 (Critical). Immediate action required due to zero-auth exploitation and high impact on device integrity.

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Vulnerability detail Full AI analysis (login) Totolink CWE-78