CVE-2026-2958
📋 TL;DR
A stack-based buffer overflow vulnerability in D-Link DWR-M960 routers allows remote attackers to execute arbitrary code by manipulating the save_apply parameter in the formWsc function. This affects D-Link DWR-M960 routers running firmware version 1.01.07. Attackers can exploit this without authentication to potentially take full control of affected devices.
💻 Affected Systems
- D-Link DWR-M960
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, creation of persistent backdoors, lateral movement to internal networks, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify device configuration, intercept network traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation prevents lateral movement.
🎯 Exploit Status
Public exploit details are available, making weaponization likely. The buffer overflow is straightforward to exploit for remote code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.dlink.com/
Restart Required: Yes
Instructions:
1. Check D-Link website for security advisories
2. Download latest firmware if available
3. Upload firmware through router admin interface
4. Reboot router after update
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected routers in separate network segments to limit potential lateral movement
Access Control Lists
linuxImplement firewall rules to restrict access to router management interfaces
iptables -A INPUT -p tcp --dport 80 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Remove affected devices from internet-facing positions and place behind firewalls
- Implement strict network monitoring for unusual traffic patterns from router devices
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is 1.01.07, device is vulnerable.Check Version:
Check via router web interface at http://router_ip/ or using telnet/ssh if enabledVerify Fix Applied:
Verify firmware version has been updated to a version later than 1.01.07📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /boafrm/formWsc
- Multiple failed authentication attempts followed by successful formWsc access
- Router configuration changes from unexpected IP addresses
Network Indicators:
- Unusual outbound connections from router to unknown IPs
- Traffic patterns suggesting router is participating in DDoS attacks
- Port scanning originating from router IP
SIEM Query:
source="router_logs" AND (uri="/boafrm/formWsc" OR message="save_apply")