CVE-2022-40620
📋 TL;DR
This vulnerability allows attackers to intercept unencrypted update requests and deliver malicious packages to affected NETGEAR routers and Orbi WiFi systems, enabling arbitrary code execution. It affects specific models running outdated firmware versions. The flaw exists in the FunJSQ third-party module's failure to properly validate TLS certificates during auto-updates.
💻 Affected Systems
- NETGEAR R6230
- NETGEAR R6260
- NETGEAR R7000
- NETGEAR R8900
- NETGEAR R9000
- NETGEAR XR300
- Orbi RBR20
- Orbi RBR50
- Orbi RBS20
- Orbi RBS50
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise with persistent backdoor installation, allowing complete network surveillance, credential theft, and lateral movement to connected devices.
Likely Case
Local network attacker gains router administrative access, enabling DNS hijacking, traffic interception, and network disruption.
If Mitigated
Attack prevented through network segmentation and proper certificate validation.
🎯 Exploit Status
Requires man-in-the-middle position on local network. No authentication needed to trigger update request.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: R6230: 1.1.0.112+, R6260: 1.1.0.88+, R7000: 1.0.11.134+, R8900: 1.0.5.42+, R9000: 1.0.5.42+, XR300: 1.0.3.72+, Orbi RBR20: 2.7.2.26+, RBR50: 2.7.4.26+, RBS20: 2.7.2.26+, RBS50: 2.7.4.26+
Vendor Advisory: https://kb.netgear.com/000065132/Security-Advisory-for-Vulnerabilities-in-FunJSQ-on-Some-Routers-and-Orbi-WiFi-Systems-PSV-2022-0117
Restart Required: Yes
Instructions:
1. Log into router admin interface. 2. Navigate to Advanced > Administration > Firmware Update. 3. Check for updates. 4. Download and install latest firmware. 5. Reboot router after installation.
🔧 Temporary Workarounds
Disable FunJSQ module
allTemporarily disable the vulnerable third-party module
Login to router admin panel > Advanced > Advanced Setup > FunJSQ > Disable
Network segmentation
allIsolate affected routers from critical network segments
🧯 If You Can't Patch
- Replace affected devices with patched models or different vendors
- Implement strict network access controls and monitor for suspicious update traffic
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under Advanced > Administration > Router StatusCheck Version:
Router-specific: Check via web interface or 'nmap -sV -p 80,443 [router-ip]' to identify model/versionVerify Fix Applied:
Confirm firmware version matches or exceeds patched versions listed in vendor advisory📡 Detection & Monitoring
Log Indicators:
- Unusual update package downloads
- Failed TLS certificate validation attempts
- Unexpected firmware modification timestamps
Network Indicators:
- Unencrypted update traffic to unusual destinations
- Man-in-the-middle activity on local network
- DNS queries to update servers without TLS validation
SIEM Query:
source="router-logs" AND (event="firmware_update" OR event="package_download") AND (status="failed" OR dest_ip!="expected_update_server")