CVE-2025-70646
📋 TL;DR
Tenda AX1803 routers running firmware v1.0.0.1 contain a stack overflow vulnerability in the security parameter handling. Attackers can send crafted requests to trigger a denial of service, potentially crashing the device. This affects all users of this specific router model and firmware version.
💻 Affected Systems
- Tenda AX1803
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash requiring physical reboot, potentially leading to extended network downtime and service disruption.
Likely Case
Router becomes unresponsive, requiring reboot to restore functionality, causing temporary network outage.
If Mitigated
If isolated from untrusted networks, impact limited to internal disruption only.
🎯 Exploit Status
Public GitHub repository contains proof-of-concept code demonstrating the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check Tenda official website for firmware updates. If available, download latest firmware and upload via router admin interface.
🔧 Temporary Workarounds
Network Segmentation
allIsolate router management interface from untrusted networks
Access Control
allRestrict access to router management interface to trusted IPs only
🧯 If You Can't Patch
- Replace affected router with updated model or different vendor
- Implement network monitoring for DoS attempts against router
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is exactly v1.0.0.1, device is vulnerable.Check Version:
Login to router admin interface and check firmware version in System Status or similar sectionVerify Fix Applied:
Verify firmware version has been updated to a version later than v1.0.0.1📡 Detection & Monitoring
Log Indicators:
- Router crash logs
- Unexpected reboots
- Failed login attempts to management interface
Network Indicators:
- Unusual traffic patterns to router management port
- Router becoming unresponsive to ping
SIEM Query:
source="router_logs" AND (event="crash" OR event="reboot")