CVE-2020-26901
📋 TL;DR
This vulnerability in certain NETGEAR WiFi systems allows unauthorized disclosure of sensitive information. It affects RBK752, RBR750, RBS750, RBK852, RBR850, and RBS850 devices running firmware versions before 3.2.15.25.
💻 Affected Systems
- RBK752
- RBR750
- RBS750
- RBK852
- RBR850
- RBS850
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could gain access to sensitive configuration data, credentials, or network information, potentially leading to full network compromise.
Likely Case
Unauthorized users accessing sensitive device information that could be used for further attacks or reconnaissance.
If Mitigated
Limited exposure of non-critical information if proper network segmentation and access controls are implemented.
🎯 Exploit Status
The advisory indicates information disclosure without authentication, suggesting relatively simple exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.2.15.25 or later
Vendor Advisory: https://kb.netgear.com/000062353/Security-Advisory-for-Sensitive-Information-Disclosure-on-Some-WiFi-Systems-PSV-2020-0036
Restart Required: Yes
Instructions:
1. Log into your NETGEAR Orbi web interface. 2. Navigate to Advanced > Administration > Firmware Update. 3. Check for updates and install firmware version 3.2.15.25 or later. 4. Reboot all affected devices after update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks and limit access to management interfaces.
Access Control
allImplement strict firewall rules to limit access to device management interfaces.
🧯 If You Can't Patch
- Isolate affected devices in a separate VLAN with strict access controls
- Monitor network traffic to/from affected devices for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check firmware version in Orbi web interface under Advanced > Administration > Firmware UpdateCheck Version:
Check via web interface: Advanced > Administration > Firmware UpdateVerify Fix Applied:
Verify firmware version shows 3.2.15.25 or later after update📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to device management interfaces
- Unusual information requests to device endpoints
Network Indicators:
- Unusual traffic patterns to device management ports
- Requests to sensitive information endpoints
SIEM Query:
source_ip=* AND (dest_port=80 OR dest_port=443) AND dest_ip=[device_ip] AND (uri_contains="sensitive" OR uri_contains="config" OR uri_contains="admin")