CVE-2026-7155 — AI Deep Analysis Summary

🚨 **Essence**: A critical Command Injection flaw in TOTOLINK A8000RU routers.…

🛡️ **Root Cause**: CWE-78 (OS Command Injection). 🐛 **Flaw**: The `setLoginPasswordCfg` function in `/cgi-bin/cstecgi.cgi` fails to properly sanitize the `admpass` parameter.…

🎯 **Affected Product**: TOTOLINK A8000RU Wireless Router. 📦 **Specific Version**: 7.1cu.643_b20200521. ⚠️ **Component**: CGI Handler (`cstecgi.cgi`). Check your firmware version immediately if you own this model.

💀 **Privileges**: Full System Control (Root/Admin). 📂 **Data Access**: Complete read/write access to the router’s file system and network configuration.…

⚡ **Threshold**: LOW. 🚪 **Auth**: None required (PR:N). 🌍 **Access**: Network accessible (AV:N). 🖱️ **UI**: None required (UI:N). This is a remote, unauthenticated vulnerability.…

🔍 **Public Exploit**: Yes. 📂 **Evidence**: GitHub repository `Litengzheng/vuldb_new2` contains a README with exploit details. 📢 **Advisory**: VDB-359754 provides technical descriptions.…

🔎 **Self-Check**: Scan for the specific CGI endpoint `/cgi-bin/cstecgi.cgi`. 📝 **Test**: Look for the `setLoginPasswordCfg` action. 🛠️ **Tool**: Use automated vulnerability scanners targeting TOTOLINK devices.…

🛠️ **Official Patch**: The data does not explicitly confirm a fixed version is released yet. 📅 **Published**: 2026-04-27. 🔄 **Action**: Check the official TOTOLINK website (totolink.net) for updates.…

🚧 **Workaround**: Block external access to the router's management interface. 🚫 **Network Segmentation**: Isolate IoT devices from critical LAN segments.…

🔥 **Priority**: CRITICAL / URGENT. 📈 **CVSS**: 9.8 (Critical). ⏳ **Risk**: Immediate exploitation possible due to no auth requirement. 🚀 **Recommendation**: Patch immediately or isolate the device.…