CVE-2026-2180
📋 TL;DR
A stack-based buffer overflow vulnerability exists in Tenda RX3 routers version 16.03.13.11. Attackers can remotely exploit this by manipulating the ssid_5g parameter in the /goform/fast_setting_wifi_set endpoint, potentially leading to arbitrary code execution. This affects all users running the vulnerable firmware version.
💻 Affected Systems
- Tenda RX3
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote attackers achieve unauthenticated remote code execution with root privileges, enabling complete device takeover, network compromise, and lateral movement into connected networks.
Likely Case
Remote code execution leading to device compromise, credential theft, DNS hijacking, or botnet enrollment.
If Mitigated
Denial of service or device crash if exploit fails or is blocked by network controls.
🎯 Exploit Status
Public exploit code is available on GitHub, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tenda.com.cn/
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. Download latest firmware for RX3 model. 3. Log into router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and apply new firmware. 6. Reboot router after update completes.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface to trusted network
🧯 If You Can't Patch
- Replace affected routers with different models or brands
- Implement strict network firewall rules blocking access to port 80/443 on router WAN interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is exactly 16.03.13.11, device is vulnerable.Check Version:
Login to router web interface and check System Status or Firmware Version pageVerify Fix Applied:
After firmware update, verify version has changed from 16.03.13.11 to a newer version.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/fast_setting_wifi_set with long ssid_5g parameters
- Router crash/reboot logs
- Failed authentication attempts to admin interface
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains
- Port scanning originating from router
SIEM Query:
source="router_logs" AND (uri="/goform/fast_setting_wifi_set" AND param_length(ssid_5g)>100) OR (event="device_reboot" AND reason="crash")