CVE-2025-4980
📋 TL;DR
This vulnerability in Netgear DGND3700 routers allows remote attackers to access sensitive information through the /currentsetting.htm file via the mini_http component. It affects users running vulnerable firmware versions, potentially exposing configuration data or credentials. The vulnerability requires no authentication and can be exploited remotely.
💻 Affected Systems
- Netgear DGND3700
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could extract router credentials, network configurations, or sensitive device information, potentially enabling further network compromise or credential reuse attacks.
Likely Case
Information disclosure of router configuration details, which could aid attackers in reconnaissance for follow-up attacks or expose network topology.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external access to the router's management interface.
🎯 Exploit Status
Exploit details are publicly available on GitHub. The vulnerability requires no authentication and can be triggered with simple HTTP requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.netgear.com/
Restart Required: No
Instructions:
Check Netgear's official website for firmware updates. If available, download the latest firmware and apply through the router's web interface under Administration > Firmware Update.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to the router's web interface
Restrict Access via Firewall
allBlock external access to port 80/443 on the router
🧯 If You Can't Patch
- Segment the router on a separate VLAN with strict access controls
- Implement network monitoring for suspicious access attempts to the router's web interface
🔍 How to Verify
Check if Vulnerable:
Access http://[router-ip]/currentsetting.htm from an external network. If it returns sensitive configuration data without authentication, the device is vulnerable.Check Version:
Check the router's web interface under Maintenance > Router Status > Firmware VersionVerify Fix Applied:
After applying any firmware update, test the same endpoint. It should return an error or require authentication.📡 Detection & Monitoring
Log Indicators:
- HTTP GET requests to /currentsetting.htm from external IPs
- Unusual access patterns to router management interface
Network Indicators:
- External traffic to router's port 80/443
- Multiple failed authentication attempts followed by /currentsetting.htm access
SIEM Query:
source_ip=external AND dest_ip=router_ip AND (url_path="/currentsetting.htm" OR user_agent_contains="scanner")