CVE-2025-6510
📋 TL;DR
A critical stack-based buffer overflow vulnerability in Netgear EX6100 firmware allows remote attackers to execute arbitrary code on affected devices. This affects Netgear EX6100 extenders running firmware version 1.0.2.28_1.1.138. The vulnerability is particularly dangerous as these products are no longer supported by the vendor.
💻 Affected Systems
- Netgear EX6100
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, persistence, lateral movement, and data exfiltration.
Likely Case
Remote attacker gains shell access to the device, enabling network reconnaissance, man-in-the-middle attacks, and potential access to connected networks.
If Mitigated
If properly segmented and monitored, impact limited to isolated device compromise without lateral movement.
🎯 Exploit Status
Proof-of-concept exploit code is publicly available on GitHub, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: N/A
Restart Required: No
Instructions:
No official patch available as product is end-of-life. Consider replacement or workarounds.
🔧 Temporary Workarounds
Network Segmentation
allIsolate EX6100 devices on separate VLAN with strict firewall rules
Access Control
allBlock all inbound traffic to EX6100 management interface from untrusted networks
🧯 If You Can't Patch
- Immediately replace affected devices with supported models
- Implement strict network segmentation and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface at http://[device-ip]/debug.htm or via SSH if enabledCheck Version:
curl -s http://[device-ip]/debug.htm | grep 'Firmware Version'Verify Fix Applied:
Verify device replacement or network segmentation implementation📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to device management interface
- Multiple failed exploit attempts
Network Indicators:
- Unusual outbound connections from EX6100 devices
- Traffic patterns matching known exploit payloads
SIEM Query:
source="EX6100" AND (http_uri CONTAINS "vulnerable_endpoint" OR http_user_agent="exploit_tool")🔗 References
- https://github.com/xiaobor123/vul-finds/tree/main/vul-find-ex6100-netgear
- https://github.com/xiaobor123/vul-finds/tree/main/vul-find-ex6100-netgear#poc
- https://vuldb.com/?ctiid.313622
- https://vuldb.com/?id.313622
- https://vuldb.com/?submit.593678
- https://vuldb.com/?submit.595995
- https://www.netgear.com/
