CVE-2024-48441
📋 TL;DR
This vulnerability allows unauthenticated attackers to execute arbitrary operating system commands on Tianyu CPE routers via the at_command.asp component. Attackers can gain full control of affected devices, potentially compromising network infrastructure. Organizations using Wuhan Tianyu Information Industry Co., Ltd Tianyu CPE routers with vulnerable firmware are affected.
💻 Affected Systems
- Wuhan Tianyu Information Industry Co., Ltd Tianyu CPE Router
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to network compromise, data exfiltration, lateral movement to other systems, and persistent backdoor installation.
Likely Case
Router compromise allowing traffic interception, credential theft, and use as pivot point for further attacks.
If Mitigated
Limited impact if device is isolated, monitored, and has restricted command execution capabilities.
🎯 Exploit Status
Public technical details available in Medium article showing exploitation via HTTP requests to at_command.asp with command injection payloads.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: No
Instructions:
No official patch available. Contact vendor Wuhan Tianyu Information Industry Co., Ltd for firmware updates.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected routers from critical networks and restrict access to management interfaces.
Access Control Lists
allImplement firewall rules to restrict access to at_command.asp endpoint.
🧯 If You Can't Patch
- Replace vulnerable devices with supported, patched alternatives
- Implement strict network monitoring and anomaly detection for suspicious router traffic
🔍 How to Verify
Check if Vulnerable:
Check firmware version via router web interface or CLI. If version matches CommonCPExCPETS_v3.2.468.11.04_P4, device is vulnerable.Check Version:
Check router web interface or use vendor-specific CLI commands (varies by model).Verify Fix Applied:
Verify firmware has been updated to a version newer than CommonCPExCPETS_v3.2.468.11.04_P4.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to at_command.asp with suspicious parameters
- Unusual command execution in router logs
- Failed authentication attempts followed by successful at_command.asp access
Network Indicators:
- Unexpected outbound connections from router
- Traffic patterns indicating command-and-control communication
- Port scanning originating from router
SIEM Query:
source="router_logs" AND (uri="*at_command.asp*" AND (param="*;*" OR param="*|*" OR param="*`*"))