CVE-2025-5934
📋 TL;DR
A critical stack-based buffer overflow vulnerability in Netgear EX3700 devices allows remote attackers to execute arbitrary code or crash the system. This affects Netgear EX3700 devices running firmware version 1.0.0.88 or earlier. The vulnerability is particularly concerning as these products are no longer supported by the maintainer.
💻 Affected Systems
- Netgear EX3700
📦 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
Remote denial of service (device crash) or limited code execution depending on exploit sophistication.
If Mitigated
No impact if device is patched or properly isolated from untrusted networks.
🎯 Exploit Status
Proof of concept exploit code is publicly available on GitHub, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.0.98
Vendor Advisory: Not provided in CVE details
Restart Required: Yes
Instructions:
1. Download firmware version 1.0.0.98 from Netgear support site. 2. Log into device admin interface. 3. Navigate to firmware update section. 4. Upload and apply the new firmware. 5. Reboot device after update completes.
🔧 Temporary Workarounds
Network Isolation
allIsolate affected devices from untrusted networks and internet access
Access Control Lists
allImplement strict firewall rules to limit access to device management interfaces
🧯 If You Can't Patch
- Replace affected devices with supported models
- Segment affected devices into isolated network zones with strict access controls
🔍 How to Verify
Check if Vulnerable:
Check firmware version via device web interface or SSH: cat /proc/version or check admin interface system infoCheck Version:
cat /proc/version or check web interface at http://[device-ip]Verify Fix Applied:
Verify firmware version shows 1.0.0.98 or higher in device admin interface📡 Detection & Monitoring
Log Indicators:
- Unusual crash logs in /var/log/messages
- Multiple failed connection attempts to device services
- Unexpected process restarts
Network Indicators:
- Unusual traffic patterns to device management ports
- Exploit payload patterns in network traffic
SIEM Query:
source="netgear_ex3700" AND (event_type="crash" OR event_type="buffer_overflow")🔗 References
- https://github.com/xiaobor123/vul-finds/tree/main/vul-find-ex3700-netgear
- https://github.com/xiaobor123/vul-finds/tree/main/vul-find-ex3700-netgear#poc
- https://vuldb.com/?ctiid.311712
- https://vuldb.com/?id.311712
- https://vuldb.com/?submit.588258
- https://www.netgear.com/
- https://github.com/xiaobor123/vul-finds/tree/main/vul-find-ex3700-netgear
- https://github.com/xiaobor123/vul-finds/tree/main/vul-find-ex3700-netgear#poc
