CVE-2023-49410
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda W30E routers via a stack overflow in the set_wan_status function. Attackers can gain full control of affected devices, potentially compromising network security. Users of Tenda W30E routers with vulnerable firmware are affected.
💻 Affected Systems
- Tenda W30E
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to persistent backdoor installation, network traffic interception, lateral movement to other devices, and participation in botnets.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access, though internal network exposure remains possible.
🎯 Exploit Status
Public proof-of-concept available on GitHub; CVSS 9.8 indicates critical severity with network-based exploitation without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not found
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates
2. If update available, download and install via router admin interface
3. Reboot router after update
4. Verify firmware version is no longer V16.01.0.12(4843)
🔧 Temporary Workarounds
Disable WAN Management
allPrevent external access to router management interface
Network Segmentation
allIsolate router on separate VLAN with restricted access
🧯 If You Can't Patch
- Replace affected router with different model or vendor
- Place router behind firewall with strict inbound rules blocking all unnecessary ports
🔍 How to Verify
Check if Vulnerable:
Access router admin interface and check firmware version under System Status or About pageCheck Version:
Not applicable - check via web interfaceVerify Fix Applied:
Confirm firmware version has changed from V16.01.0.12(4843) to a newer version📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to router management interface
- Multiple failed authentication attempts followed by successful access
- Unexpected configuration changes
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns suggesting device compromise
- Port scans originating from router
SIEM Query:
source_ip=router_ip AND (http_method=POST AND uri_contains="set_wan_status" OR failed_auth>5)