CVE-2025-57573
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code or cause denial of service on Tenda F3 routers via a buffer overflow in the wifiTimeClose parameter. Attackers can exploit this by sending specially crafted requests to the router's web interface. All users of affected Tenda F3 router versions are potentially impacted.
💻 Affected Systems
- Tenda F3
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete router compromise, network traffic interception, credential theft, and lateral movement to connected devices.
Likely Case
Router crash/reboot causing temporary network disruption, or limited code execution allowing configuration changes.
If Mitigated
Denial of service only if exploit attempts are blocked by network controls, with no code execution.
🎯 Exploit Status
Exploitation requires sending crafted HTTP requests to the router's web interface. No public exploit code is available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Tenda for latest firmware updates
Vendor Advisory: http://tenda.com
Restart Required: Yes
Instructions:
1. Log into Tenda router admin interface. 2. Navigate to System Tools > Firmware Upgrade. 3. Check for and install latest firmware. 4. Reboot router after update.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router web interface
Restrict management interface access
allLimit web interface access to trusted IP addresses only
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict firewall rules
- Disable unused features and services on the router
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface. If version is V12.01.01.48_multi or later, it may be vulnerable.Check Version:
Check via router web interface at System Status or similar sectionVerify Fix Applied:
Verify firmware version after update is newer than V12.01.01.48_multi and test web interface functionality.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /goform/setWifi with abnormal wifiTimeClose parameter values
- Router crash/reboot logs
Network Indicators:
- Unusual HTTP POST requests to router management interface
- Multiple connection attempts to router web port
SIEM Query:
source="router_logs" AND (uri="/goform/setWifi" OR message="buffer overflow" OR message="crash")