CVE-2023-27019
📋 TL;DR
This CVE describes a critical stack overflow vulnerability in Tenda AC10 routers that allows attackers to execute arbitrary code or cause denial of service. Attackers can exploit this by sending specially crafted payloads to the vulnerable function. Users of affected Tenda AC10 router models with the specified firmware version are at risk.
💻 Affected Systems
- Tenda AC10 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full remote code execution leading to complete router compromise, credential theft, network traffic interception, and lateral movement into connected networks.
Likely Case
Router crash causing denial of service, requiring physical reset and disrupting network connectivity for all connected devices.
If Mitigated
Limited impact if routers are behind firewalls with strict inbound filtering, though internal threats remain possible.
🎯 Exploit Status
Public GitHub repository contains technical details and likely exploit code. Stack overflow vulnerabilities in embedded devices are frequently weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not provided in CVE references
Restart Required: Yes
Instructions:
1. Check Tenda official website for firmware updates
2. If update available, download and flash firmware
3. Factory reset router after update
4. Reconfigure with secure settings
🔧 Temporary Workarounds
Disable remote management
allPrevent external exploitation by disabling WAN-side management access
Network segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace affected router with different model/brand that receives security updates
- Place router behind dedicated firewall with strict inbound filtering rules
🔍 How to Verify
Check if Vulnerable:
Check router web interface or serial console for firmware version matching US_AC10V4.0si_V16.03.10.13_cnCheck Version:
Check router web interface at 192.168.0.1 or 192.168.1.1 under System Status or About sectionsVerify Fix Applied:
Verify firmware version has been updated to a newer release than the vulnerable version📡 Detection & Monitoring
Log Indicators:
- Router crash/reboot logs
- Unusual traffic patterns to router management interface
- Memory corruption errors in system logs
Network Indicators:
- Unusual payloads sent to router management ports
- Traffic patterns matching known exploit signatures
SIEM Query:
source="router_logs" AND ("crash" OR "reboot" OR "memory" OR "overflow")