CVE-2023-44015
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda AC10U routers by exploiting a stack overflow in the setSchedWifi function. Attackers can gain full control of affected devices by sending specially crafted requests to the vulnerable parameter. This affects all users running the vulnerable firmware version.
💻 Affected Systems
- Tenda AC10U
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to persistent backdoor installation, network traffic interception, credential theft, and lateral movement to other network devices.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as a botnet node.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Public proof-of-concept available on GitHub. Exploitation requires sending crafted HTTP requests to the router's web 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 for AC10U. 3. Log into router admin 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 web interface
Log into router admin > Advanced > System > Remote Management > Disable
Network segmentation
allIsolate router management interface from untrusted networks
Configure firewall rules to block external access to router IP on ports 80/443
🧯 If You Can't Patch
- Replace affected routers with patched or different vendor models
- Implement strict network access controls and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or System Tools > Firmware UpgradeCheck Version:
curl -s http://router-ip/ | grep -i firmware or check web interfaceVerify Fix Applied:
Verify firmware version is newer than US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to setSchedWifi endpoint
- Multiple failed login attempts followed by successful exploitation
Network Indicators:
- Unusual outbound connections from router
- Traffic to known malicious IPs from router
SIEM Query:
source="router-logs" AND (uri="/goform/setSchedWifi" OR uri="*setSchedWifi*") AND method="POST"