CVE-2026-2857
📋 TL;DR
A stack-based buffer overflow vulnerability in the D-Link DWR-M960 router's port forwarding configuration endpoint allows remote attackers to execute arbitrary code. This affects D-Link DWR-M960 routers running firmware version 1.01.07. Remote exploitation is possible without authentication.
💻 Affected Systems
- D-Link DWR-M960
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data exfiltration, and use as a pivot point into internal networks.
Likely Case
Remote code execution allowing attackers to install malware, create backdoors, or disrupt network services.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access or if exploit attempts are blocked by network security controls.
🎯 Exploit Status
Exploit details are publicly available on GitHub. The vulnerability requires sending a specially crafted request to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.dlink.com/
Restart Required: No
Instructions:
Check D-Link website for firmware updates. If available, download and install via web interface: Login > Maintenance > Firmware Upgrade > Browse > Upload > Apply.
🔧 Temporary Workarounds
Disable WAN access to web interface
allPrevent external access to the vulnerable endpoint by disabling remote administration.
Restrict access with firewall rules
allBlock external access to port 80/443 on the router's WAN interface.
🧯 If You Can't Patch
- Replace affected device with a supported model
- Segment network to isolate vulnerable device
🔍 How to Verify
Check if Vulnerable:
Check firmware version in web interface: Login > Maintenance > Firmware Version. If version is 1.01.07, device is vulnerable.Check Version:
curl -s http://router-ip/boafrm/firmware | grep versionVerify Fix Applied:
Verify firmware version is no longer 1.01.07 after update. Test by attempting to access /boafrm/formPortFw endpoint with monitoring for crash.📡 Detection & Monitoring
Log Indicators:
- Web server crashes
- Unusual POST requests to /boafrm/formPortFw
- Large payloads in HTTP requests
Network Indicators:
- HTTP POST requests to /boafrm/formPortFw with oversized submit-url parameter
- Traffic patterns indicating buffer overflow attempts
SIEM Query:
source="router_logs" AND (uri="/boafrm/formPortFw" AND method="POST" AND size_bytes>1000)