CVE-2026-0408
📋 TL;DR
A path traversal vulnerability in NETGEAR WiFi range extenders allows authenticated LAN attackers to access sensitive webproc files containing router GUI credentials. This affects users of specific NETGEAR range extender models who have not applied security patches. Attackers can potentially steal administrative credentials for the router interface.
💻 Affected Systems
- NETGEAR EX2800
- NETGEAR EX3110
- NETGEAR EX5000
- NETGEAR EX6110
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains administrative access to router, can reconfigure network settings, intercept traffic, install malware, or pivot to other devices on the network.
Likely Case
Attacker steals router admin credentials, potentially gaining persistent access to network management interface and monitoring network traffic.
If Mitigated
With proper network segmentation and access controls, impact limited to isolated range extender management interface only.
🎯 Exploit Status
Exploitation requires LAN access and knowledge of path traversal techniques to access webproc files
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check specific model firmware updates on NETGEAR support pages
Vendor Advisory: https://kb.netgear.com/000070442/January-2026-NETGEAR-Security-Advisory
Restart Required: Yes
Instructions:
1. Visit NETGEAR support page for your specific model. 2. Download latest firmware. 3. Log into range extender admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Device will restart automatically.
🔧 Temporary Workarounds
Network Segmentation
allIsolate range extenders on separate VLAN to limit lateral movement
Access Control
allRestrict LAN access to range extender management interface to trusted devices only
🧯 If You Can't Patch
- Segment range extenders on isolated network/VLAN
- Change router admin credentials regularly and monitor for unauthorized access
🔍 How to Verify
Check if Vulnerable:
Check firmware version against NETGEAR advisory for your specific modelCheck Version:
Log into range extender admin interface and check firmware version in settingsVerify Fix Applied:
Verify firmware version has been updated to latest version from NETGEAR support📡 Detection & Monitoring
Log Indicators:
- Unusual access to webproc files
- Multiple failed login attempts to router admin interface
- Unexpected firmware version changes
Network Indicators:
- Unusual HTTP requests to range extender management interface with path traversal patterns
SIEM Query:
source="range_extender_logs" AND (uri="*webproc*" OR uri="*../*")