CVE-2025-57058
📋 TL;DR
This vulnerability in Tenda G3 routers allows attackers to trigger stack overflows via specially crafted requests to the formSetDebugCfg function, leading to Denial of Service (DoS). Attackers can crash the device by exploiting the pEnable, pLevel, and pModule parameters. Organizations using affected Tenda G3 routers are at risk.
💻 Affected Systems
- Tenda G3
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash requiring physical reboot, potentially disrupting all network services and allowing further exploitation if combined with other vulnerabilities.
Likely Case
Router becomes unresponsive, requiring manual reboot and causing temporary network outage.
If Mitigated
Limited impact with proper network segmentation and access controls preventing unauthorized access to management interface.
🎯 Exploit Status
Exploit details are publicly available in GitHub repositories. The vulnerability requires network access to the management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. Download latest firmware. 3. Access router web interface. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload and install new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router management interface
Network Segmentation
allIsolate router management interface to trusted network segments only
🧯 If You Can't Patch
- Implement strict firewall rules to block external access to router management interface (typically port 80/443)
- Use VPN for management access instead of exposing interface directly
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at System Status > Firmware VersionCheck Version:
curl -s http://router-ip/status.cgi | grep firmware_versionVerify Fix Applied:
Verify firmware version is newer than v3.0br_V15.11.0.17📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /goform/setDebugCfg
- Router crash/reboot events
- Unusual traffic to router management interface
Network Indicators:
- HTTP POST requests with long parameter values to /goform/setDebugCfg
- Sudden loss of connectivity to router
SIEM Query:
source="router_logs" AND (uri_path="/goform/setDebugCfg" OR event="crash" OR event="reboot")