CVE-2026-7203 — AI Deep Analysis Summary

🚨 **Essence**: A critical **Command Injection** flaw in TOTOLINK A8000RU. <br>💥 **Consequences**: Attackers can execute arbitrary OS commands on the router.…

🛡️ **Root Cause**: **CWE-78** (OS Command Injection). <br>🔍 **Flaw**: The `setUrlFilterRules` function in `/cgi-bin/cstecgi.cgi` fails to properly sanitize the `enable` parameter.…

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

👑 **Privileges**: Full **OS-level access** (root/system privileges). <br>📂 **Data Impact**: Complete **Confidentiality, Integrity, and Availability** loss.…

⚡ **Threshold**: **LOW**. <br>🔓 **Auth**: **None Required** (PR:N). <br>🌐 **Network**: Remote (AV:N). <br>🎯 **Complexity**: Low (AC:L). Any unauthenticated user on the network can exploit this via the CGI interface.

🧪 **Public Exploit**: **Yes**. <br>📂 **Evidence**: GitHub repository `Litengzheng/vuldb_new2` contains exploit code (README.md).…

🔍 **Self-Check**: <br>1. Scan for `/cgi-bin/cstecgi.cgi` endpoint. <br>2. Check firmware version for **7.1cu.643_b20200521**. <br>3. Use vulnerability scanners (Nessus/OpenVAS) with CVE-2026-7203 signatures. <br>4.…

🩹 **Official Fix**: **Unknown/Not Provided** in current data. <br>📝 **Action**: Check Totolink's official website for firmware updates.…

🚧 **Workaround**: <br>1. **Disable** the `setUrlFilterRules` CGI function if possible via admin panel. <br>2. **Block** external access to port 80/443 on the router. <br>3. **Restrict** LAN access to trusted IPs only.…

🔥 **Urgency**: **CRITICAL**. <br>🚨 **Priority**: **Immediate Action Required**. <br>📉 **Risk**: High CVSS (9.8), no auth needed, remote exploit. <br>💡 **Advice**: Patch immediately or disconnect from the network.…