CVE-2025-2957
📋 TL;DR
A null pointer dereference vulnerability in the TRENDnet TEW-411BRP+ router's HTTP request handler allows local network attackers to crash the httpd service, causing denial of service. This affects users of TRENDnet TEW-411BRP+ routers running firmware version 2.07. The vulnerability requires local network access for exploitation.
💻 Affected Systems
- TRENDnet TEW-411BRP+
⚠️ 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 denial of service for the router's web interface and potentially other services dependent on httpd, requiring physical reset or power cycle to restore functionality.
Likely Case
Temporary service disruption of the router's web management interface until the httpd process restarts or the router reboots.
If Mitigated
Minimal impact with proper network segmentation isolating the router from untrusted internal devices.
🎯 Exploit Status
Exploit details have been publicly disclosed. The attack requires sending a specially crafted HTTP request to the router's web interface from within the local network.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch is available. Consider upgrading to a newer router model as this device appears to be end-of-life with no vendor response.
🔧 Temporary Workarounds
Disable HTTP Management Interface
linuxDisable the web management interface to prevent exploitation of the httpd vulnerability
Access router CLI via telnet/SSH and disable httpd service if possible
Use: killall httpd (temporary)
Restrict Management Access
allLimit which devices can access the router's management interface
Configure firewall rules to only allow management from specific trusted IPs
🧯 If You Can't Patch
- Segment the network to isolate the router from untrusted devices
- Monitor for suspicious HTTP requests to the router's management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at http://router_ip/status.asp or via telnet/SSH with 'cat /proc/version'Check Version:
telnet router_ip (then check firmware version in interface) or check web interface at http://router_ip/status.aspVerify Fix Applied:
No fix available to verify. Monitor for httpd crashes in system logs after implementing workarounds.📡 Detection & Monitoring
Log Indicators:
- httpd process crashes in system logs
- Segmentation fault errors related to httpd
Network Indicators:
- Unusual HTTP requests to router management interface from internal hosts
- Multiple connection attempts to router port 80
SIEM Query:
source="router_logs" AND ("segmentation fault" OR "httpd crashed" OR "null pointer")