CVE-2025-45847
📋 TL;DR
This vulnerability allows authenticated attackers to execute arbitrary code on ALFA AIP-W512 routers via a stack overflow in the formWsc function. Attackers with valid credentials can exploit this to gain full control of affected devices. Only ALFA AIP-W512 routers running vulnerable firmware versions are affected.
💻 Affected Systems
- ALFA AIP-W512
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, lateral movement to other devices, and router configuration manipulation.
Likely Case
Remote code execution allowing attackers to install malware, create botnet nodes, or disrupt network connectivity.
If Mitigated
Limited impact if strong authentication controls prevent unauthorized access and network segmentation isolates the router.
🎯 Exploit Status
Exploit code is publicly available on GitHub. Requires valid credentials but exploitation is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://files.alfa.com.tw/?dir=%5B2%5D%20WiFi%20Home%20Router/AIP-W512
Restart Required: Yes
Instructions:
1. Check vendor website for firmware updates. 2. Download latest firmware. 3. Access router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable WPS functionality
allDisable Wi-Fi Protected Setup (WPS) feature to prevent access to vulnerable formWsc function
Restrict admin access
allLimit admin interface access to specific IP addresses or VLANs
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict firewall rules
- Implement strong authentication with complex passwords and enable 2FA if available
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under System Status or About sectionCheck Version:
Login to router admin interface and navigate to System Status pageVerify Fix Applied:
Verify firmware version has been updated to a version newer than v3.2.2.2.3📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful login and WPS-related requests
- Unusual POST requests to formWsc endpoint with long targetAPMac parameters
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns indicating command and control communication
SIEM Query:
source_ip="router_ip" AND (uri="*formWsc*" OR user_agent="*exploit*" OR http_method="POST" AND content_length>1000)