CVE-2025-12619
📋 TL;DR
A buffer overflow vulnerability in Tenda A15 routers allows remote attackers to execute arbitrary code by manipulating the wpapsk_crypto2_4g parameter. This affects Tenda A15 routers running firmware version 15.13.07.13. Attackers can exploit this without authentication to potentially take full control of affected devices.
💻 Affected Systems
- Tenda A15
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, network infiltration, data theft, and use as botnet node
Likely Case
Router takeover enabling traffic interception, DNS hijacking, and lateral movement into connected networks
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and strong network segmentation
🎯 Exploit Status
Exploit details are publicly available; buffer overflow in fromSetWirelessRepeat function
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tenda.com.cn/
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates 2. Download latest firmware 3. Upload via router admin interface 4. Reboot router
🔧 Temporary Workarounds
Disable Wireless Repeater Function
allTurn off the vulnerable wireless repeater feature to prevent exploitation
Login to router admin > Wireless Settings > Disable Repeater Mode
Restrict WAN Access
linuxBlock external access to router management interface
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Isolate affected routers in separate VLAN with strict firewall rules
- Implement network monitoring for unusual traffic patterns from routers
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface; if version is 15.13.07.13, device is vulnerableCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version has changed from 15.13.07.13 after update📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/openNetworkGateway
- Multiple failed buffer overflow attempts in system logs
Network Indicators:
- Abnormal traffic patterns from router to external IPs
- Unexpected outbound connections from router
SIEM Query:
source="router.log" AND "openNetworkGateway" AND "wpapsk_crypto2_4g"