CVE-2020-14115
📋 TL;DR
A command injection vulnerability in Xiaomi Router AX3600 allows attackers to execute arbitrary code by exploiting insufficient input validation. This affects all users of vulnerable router firmware versions. Attackers can potentially take full control of affected routers.
💻 Affected Systems
- Xiaomi Router AX3600
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attacker to intercept all network traffic, install persistent malware, pivot to internal networks, and use router as attack platform.
Likely Case
Router takeover enabling traffic interception, DNS hijacking, credential theft, and lateral movement to connected devices.
If Mitigated
Limited impact if router is behind firewall with restricted management interface access and network segmentation.
🎯 Exploit Status
Exploitation requires network access to router management interface. No authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware version 1.0.50 or later
Vendor Advisory: https://trust.mi.com/zh-CN/misrc/bulletins/advisory?cveId=37
Restart Required: Yes
Instructions:
1. Log into router admin interface. 2. Navigate to System Settings > Firmware Update. 3. Check for updates and install version 1.0.50 or later. 4. Reboot router after update completes.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router management interface
Navigate to router admin > Security > Remote Management > Disable
Restrict Management Interface Access
allLimit management interface to specific IP addresses
Navigate to router admin > Security > Access Control > Add allowed IPs only
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict firewall rules
- Implement network monitoring for suspicious router traffic patterns
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Settings > Firmware VersionCheck Version:
Not applicable - check via web interfaceVerify Fix Applied:
Confirm firmware version is 1.0.50 or higher in admin interface📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in router logs
- Multiple failed login attempts to admin interface
- Unexpected firmware modification attempts
Network Indicators:
- Unusual outbound connections from router
- DNS queries to malicious domains from router
- Unexpected port scans originating from router
SIEM Query:
source="router" AND (event_type="command_execution" OR event_type="firmware_change")