CVE-2022-25445
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda AC6 routers via a stack overflow in the PowerSaveSet function. Attackers can exploit this by sending specially crafted requests to the vulnerable time parameter. All users running the affected firmware version are at risk.
💻 Affected Systems
- Tenda AC6 wireless router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, and lateral movement to other devices on the network.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as part of a botnet.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
Public proof-of-concept code exists in GitHub repositories. Exploitation requires network access to the router's web interface.
🛠️ 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 for AC6 model
3. Access router admin interface
4. Navigate to System Tools > Firmware Upgrade
5. Upload and install new firmware
6. Reboot router
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router web interface
Network segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace affected router with different model or vendor
- Place router behind dedicated firewall with strict inbound rules
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or System ToolsCheck Version:
Not applicable - check via web interfaceVerify Fix Applied:
Verify firmware version is no longer v15.03.05.09_multi📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to PowerSaveSet endpoint
- Multiple failed login attempts followed by successful exploit
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns suggesting device compromise
SIEM Query:
source_ip=router_ip AND (uri_path="*PowerSaveSet*" OR method=POST AND user_agent="*curl*" OR "*python*" OR "*nmap*")