CVE-2025-7795
📋 TL;DR
A critical stack-based buffer overflow vulnerability in Tenda FH451 routers allows remote attackers to execute arbitrary code by manipulating the 'page' parameter in the fromP2pListFilter function. This affects Tenda FH451 routers running firmware version 1.0.0.9. Successful exploitation could lead to complete device compromise.
💻 Affected Systems
- Tenda FH451
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full router compromise, credential theft, network pivoting, and persistent backdoor installation.
Likely Case
Router compromise allowing attacker to intercept network traffic, modify DNS settings, or disable security features.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and regular patching is performed.
🎯 Exploit Status
Public proof-of-concept available, remote exploitation without authentication, simple buffer overflow technique.
🛠️ 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 3. Access router admin interface 4. Navigate to firmware upgrade section 5. Upload and apply new firmware 6. Reboot router
🔧 Temporary Workarounds
Disable Remote Management
allPrevent WAN access to router management interface
Network Segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace affected router with different model or vendor
- Implement strict firewall rules blocking all WAN access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface. If version is 1.0.0.9, device is vulnerable.Check Version:
Login to router admin interface and check System Status or Firmware Version pageVerify Fix Applied:
Verify firmware version has changed from 1.0.0.9 to a newer version after update.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/P2pListFilter
- Multiple failed buffer overflow attempts
- Sudden router reboots or crashes
Network Indicators:
- Unusual traffic patterns to router management port
- Exploit strings in HTTP requests to router
SIEM Query:
source="router_logs" AND (uri="/goform/P2pListFilter" OR message="buffer overflow")