CVE-2026-2881
📋 TL;DR
A stack-based buffer overflow vulnerability in D-Link DWR-M960 routers allows remote attackers to execute arbitrary code by manipulating the submit-url parameter in the Advanced Firewall Configuration endpoint. This affects users running firmware version 1.01.07 on these devices. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- D-Link DWR-M960
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full device compromise, persistent backdoor installation, network traffic interception, and lateral movement to other devices.
Likely Case
Device crash/reboot causing service disruption, or limited code execution allowing configuration changes and credential theft.
If Mitigated
Denial of service from failed exploitation attempts, with no code execution due to proper network segmentation and access controls.
🎯 Exploit Status
Exploit code is publicly available on GitHub. The vulnerability requires no authentication and has straightforward exploitation due to buffer overflow in submit-url parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.dlink.com/
Restart Required: Yes
Instructions:
1. Check D-Link website for firmware updates. 2. Download latest firmware for DWR-M960. 3. Access router web interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router after update completes.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface to trusted network segment
🧯 If You Can't Patch
- Replace vulnerable device with supported model
- Implement strict firewall rules to block all external access to router management interface (TCP ports 80/443)
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface: System Status > Firmware Information. If version is 1.01.07, device is vulnerable.Check Version:
curl -s http://router-ip/boafrm/formFirewallAdv | grep -i version (or check web interface)Verify Fix Applied:
After firmware update, verify version is no longer 1.01.07. Test that Advanced Firewall Configuration page functions normally without crashes.📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /boafrm/formFirewallAdv with long submit-url parameters
- Router crash/reboot logs
- Unusual process creation in router logs
Network Indicators:
- Unusual HTTP POST traffic to router management interface with oversized parameters
- Traffic patterns suggesting exploit delivery
SIEM Query:
source="router_logs" AND (url="/boafrm/formFirewallAdv" AND content_length>1000) OR (event="crash" AND process="httpd")