CVE-2025-63462
📋 TL;DR
This CVE describes a stack overflow vulnerability in Totolink A7000R routers via the wifiOff parameter. Attackers can send crafted requests to trigger a Denial of Service (DoS), crashing the device. Only users of the specific Totolink A7000R model with vulnerable firmware are affected.
💻 Affected Systems
- Totolink A7000R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash requiring physical reboot, potentially disrupting all network services on the affected router.
Likely Case
Temporary DoS causing network interruption until device automatically reboots or is manually restarted.
If Mitigated
Minimal impact if device is behind firewall blocking external access to management interface.
🎯 Exploit Status
Public GitHub repository contains technical details and likely exploit code. No authentication required to trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: Yes
Instructions:
1. Check Totolink website for firmware updates
2. If update available, download and follow vendor flashing instructions
3. Reboot router after update
4. Verify new firmware version
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router management interface
Access router admin panel -> Advanced -> Remote Management -> Disable
Restrict management interface access
allLimit management interface to trusted IP addresses only
Access router admin panel -> Security -> Access Control -> Add trusted IP ranges
🧯 If You Can't Patch
- Place router behind firewall that blocks all external access to management ports
- Replace vulnerable device with supported model if no patch becomes available
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin panel under System -> Firmware UpgradeCheck Version:
Check router web interface or use nmap/router scanning tools to identify firmwareVerify Fix Applied:
Verify firmware version no longer matches vulnerable version v9.1.0u.6115_B20201022📡 Detection & Monitoring
Log Indicators:
- Router crash/reboot logs
- Unusual requests to management interface with wifiOff parameter
Network Indicators:
- Sudden loss of connectivity from router
- Unusual traffic patterns to router management port
SIEM Query:
source="router_logs" AND ("crash" OR "reboot" OR "wifiOff")