CVE-2025-44083
📋 TL;DR
This vulnerability allows remote attackers to bypass administrator login authentication on D-Link DI-8100 routers. Attackers can gain administrative access without valid credentials, potentially compromising the entire device. Organizations using affected D-Link DI-8100 routers are at risk.
💻 Affected Systems
- D-Link DI-8100
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover allowing configuration changes, traffic interception, network pivoting, and installation of persistent backdoors.
Likely Case
Unauthorized administrative access leading to network reconnaissance, credential harvesting, and potential lateral movement within the network.
If Mitigated
Limited impact if device is behind firewall with restricted access, though authentication bypass remains possible for authorized network users.
🎯 Exploit Status
Public GitHub repository contains detailed exploitation information. The authentication bypass appears straightforward to implement.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check D-Link security advisories for firmware updates. If available, download from official D-Link support portal and follow firmware upgrade procedures.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected routers in separate network segments with strict firewall rules
Access Restriction
allRestrict administrative interface access to specific trusted IP addresses only
🧯 If You Can't Patch
- Replace affected devices with supported models from D-Link or alternative vendors
- Implement network monitoring and intrusion detection specifically for authentication bypass attempts on these devices
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System Status or Maintenance section. If version is 16.07.26A1, device is vulnerable.Check Version:
No CLI command available. Check via web interface at http://[router-ip]/ or consult device documentation.Verify Fix Applied:
Verify firmware version has been updated to a version later than 16.07.26A1. Test authentication bypass using known exploit methods to confirm fix.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful login from same IP
- Administrative actions from unexpected IP addresses
- Login events without corresponding authentication logs
Network Indicators:
- HTTP requests to administrative endpoints without preceding authentication requests
- Unusual administrative traffic patterns
SIEM Query:
source="router_logs" AND (event_type="login_success" AND NOT preceding(event_type="login_attempt" within 5s)) OR (uri="/admin/*" AND NOT referer="*/login*")