CVE-2025-44895
📋 TL;DR
This CVE describes a stack overflow vulnerability in the FW-WGS-804HPT router's web interface. Attackers can exploit this by sending specially crafted requests to the ipv4Aclkey parameter, potentially allowing remote code execution or denial of service. Only users of this specific router model and firmware version are affected.
💻 Affected Systems
- FW-WGS-804HPT router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with root privileges, allowing complete device takeover and lateral movement into connected networks.
Likely Case
Denial of service causing router crash and network disruption, requiring physical reset.
If Mitigated
Limited impact if network segmentation isolates the router and web interface access is restricted.
🎯 Exploit Status
The referenced blog post appears to contain technical details that could be used to create an exploit. Stack overflow vulnerabilities in embedded devices are commonly weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Check vendor website for firmware updates. 2. Download latest firmware. 3. Backup current configuration. 4. Upload new firmware via web interface. 5. Reboot router. 6. Restore configuration if needed.
🔧 Temporary Workarounds
Disable web management interface
allPrevent access to the vulnerable web interface component
Access router CLI via SSH/Telnet
Navigate to web interface settings
Disable HTTP/HTTPS management
Restrict web interface access
allLimit which IP addresses can access the management interface
Configure firewall rules to allow only trusted IPs
Set up VPN for management access
🧯 If You Can't Patch
- Segment the router on isolated network VLAN
- Implement strict network ACLs to block external access to port 80/443
🔍 How to Verify
Check if Vulnerable:
Check firmware version in web interface: System > Firmware or via CLI command 'show version'Check Version:
show versionVerify Fix Applied:
Verify firmware version is no longer v1.305b241111 and test web interface functionality📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /web_acl_ipv4BasedAceAdd
- Large payloads in ipv4Aclkey parameter
- Router crash/reboot logs
Network Indicators:
- Unusual traffic to router management port 80/443
- Large HTTP POST requests with crafted ipv4Aclkey values
SIEM Query:
source="router_logs" AND (uri="/web_acl_ipv4BasedAceAdd" OR parameter="ipv4Aclkey")