CVE-2026-1596
📋 TL;DR
This CVE describes a remote command injection vulnerability in D-Link DWR-M961 routers. Attackers can execute arbitrary commands on affected devices by manipulating the fota_url parameter during firmware upgrade requests. Organizations and individuals using these routers are at risk.
💻 Affected Systems
- D-Link DWR-M961
⚠️ 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
Complete device compromise allowing persistent backdoor installation, network traffic interception, lateral movement to connected devices, and botnet recruitment.
Likely Case
Unauthorized command execution leading to device configuration changes, service disruption, credential theft, and potential data exfiltration.
If Mitigated
Limited impact with proper network segmentation, firewall rules blocking external access to management interfaces, and regular monitoring.
🎯 Exploit Status
Exploit code is publicly available on GitHub, making this easily weaponizable by attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.dlink.com/
Restart Required: No
Instructions:
1. Check D-Link website for security advisories
2. If patch available, download firmware update
3. Upload via web interface
4. Apply update
5. Verify version change
🔧 Temporary Workarounds
Network Segmentation
allIsolate DWR-M961 routers from internet and restrict access to management interfaces
Firewall Rules
linuxBlock external access to router web interface and management ports
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Replace affected devices with patched or alternative models
- Disable LTE firmware upgrade functionality if possible in configuration
🔍 How to Verify
Check if Vulnerable:
Check router web interface for firmware version 1.1.47Check Version:
curl -s http://router-ip/status.html | grep FirmwareVerify Fix Applied:
Verify firmware version is updated beyond 1.1.47📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /boafrm/formLtefotaUpgradeQuectel
- Suspicious command execution in system logs
- Multiple failed upgrade attempts
Network Indicators:
- Unexpected outbound connections from router
- Traffic to unusual ports from router
- HTTP requests with shell metacharacters in parameters
SIEM Query:
source="router_logs" AND (uri="/boafrm/formLtefotaUpgradeQuectel" OR cmd="*sh*" OR process="*bash*")