CVE-2022-26243
📋 TL;DR
CVE-2022-26243 is a buffer overflow vulnerability in Tenda AC10-1200 routers that allows attackers to execute arbitrary code or cause denial of service. The vulnerability affects users of Tenda AC10-1200 routers running vulnerable firmware versions. Attackers can exploit this remotely without authentication.
💻 Affected Systems
- Tenda AC10-1200
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete router compromise, network traffic interception, credential theft, and lateral movement into connected devices.
Likely Case
Router crash causing denial of service, requiring physical reset and disrupting network connectivity for all connected devices.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access, though internal network attacks remain possible.
🎯 Exploit Status
Detailed exploit analysis and proof-of-concept available in public references. The vulnerability is in the setSmartPowerManagement function via sscanf buffer overflow.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Tenda website for firmware updates beyond v15.03.06.23_EN
Vendor Advisory: Not specified in provided references
Restart Required: Yes
Instructions:
1. Visit Tenda support website. 2. Download latest firmware for AC10-1200. 3. Log into 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 administration interface
Network segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace router with different model that doesn't have this vulnerability
- Place router behind dedicated firewall with strict inbound rules blocking all unnecessary ports
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or System ToolsCheck Version:
Login to router web interface and check System Status pageVerify Fix Applied:
Verify firmware version is updated to version newer than v15.03.06.23_EN📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/setSmartPowerManagement
- Router crash/reboot logs
- Multiple failed exploit attempts
Network Indicators:
- Unusual traffic to router management port (typically 80/443)
- Exploit pattern in HTTP requests
SIEM Query:
http.method=POST AND http.uri="/goform/setSmartPowerManagement" AND (http.user_agent contains unusual OR http.content_length > threshold)