CVE-2025-6511
📋 TL;DR
A critical stack-based buffer overflow vulnerability in Netgear EX6150 firmware allows remote attackers to execute arbitrary code or crash the device. This affects Netgear EX6150 extenders running firmware version 1.0.0.46_1.0.76. The vulnerability is particularly dangerous because these products are no longer supported by the vendor.
💻 Affected Systems
- Netgear EX6150
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, persistence, and potential lateral movement within the network.
Likely Case
Device crash (denial of service) or limited code execution to modify device settings.
If Mitigated
No impact if device is isolated from untrusted networks or replaced with supported hardware.
🎯 Exploit Status
Public proof-of-concept code exists in GitHub repositories. The vulnerability requires no authentication and has straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: N/A
Restart Required: No
Instructions:
No official patch available. Netgear has ended support for this product. Replace with supported hardware.
🔧 Temporary Workarounds
Network Segmentation
allIsolate EX6150 devices on separate VLANs with strict firewall rules to prevent remote access.
Disable Remote Management
allEnsure remote management features are disabled in device settings if available.
🧯 If You Can't Patch
- Immediately replace affected EX6150 devices with supported hardware
- Implement strict network segmentation and firewall rules to limit device exposure
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface at http://[device-ip]/debug.htm or via serial console.Check Version:
curl -s http://[device-ip]/debug.htm | grep 'Firmware Version'Verify Fix Applied:
Verify device has been physically replaced with supported hardware or removed from network.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to device management interface
- Device crash/reboot logs
- Memory corruption errors in system logs
Network Indicators:
- HTTP POST requests to device IP with large payloads
- Traffic patterns matching known exploit code
SIEM Query:
source="netgear_logs" AND ("buffer overflow" OR "segmentation fault" OR "crash")🔗 References
- https://github.com/xiaobor123/vul-finds/tree/main/vul-find-ex6150-netgear
- https://github.com/xiaobor123/vul-finds/tree/main/vul-find-ex6150-netgear#poc
- https://vuldb.com/?ctiid.313623
- https://vuldb.com/?id.313623
- https://vuldb.com/?submit.595999
- https://vuldb.com/?submit.596008
- https://www.netgear.com/
