CVE-2025-6614
📋 TL;DR
A critical stack-based buffer overflow vulnerability in D-Link DIR-619L routers allows remote attackers to execute arbitrary code by manipulating the curTime parameter. This affects the formSetWANType_Wizard5 function and can lead to complete system compromise. Only unsupported products are vulnerable, limiting the affected population.
💻 Affected Systems
- D-Link DIR-619L
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full router compromise, credential theft, network pivoting, and persistent backdoor installation.
Likely Case
Router takeover enabling man-in-the-middle attacks, DNS hijacking, and network surveillance.
If Mitigated
Limited impact if device is isolated behind firewalls with strict network segmentation.
🎯 Exploit Status
Proof-of-concept exploit code is publicly available on GitHub.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch exists as product is end-of-life. Replace with supported hardware.
🔧 Temporary Workarounds
Network Isolation
allPlace vulnerable routers behind firewalls with strict inbound filtering.
Access Control
allRestrict administrative interface access to trusted IP addresses only.
🧯 If You Can't Patch
- Immediately replace affected routers with supported models
- Segment vulnerable devices into isolated network zones
🔍 How to Verify
Check if Vulnerable:
Check router web interface for model DIR-619L and firmware version 2.06B01.Check Version:
Connect to router web interface and navigate to Status > Device InfoVerify Fix Applied:
Verify router has been replaced with supported hardware or isolated from untrusted networks.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/formSetWANType_Wizard5 with manipulated curTime parameter
Network Indicators:
- Unexpected outbound connections from router, unusual traffic patterns
SIEM Query:
source_ip=router_ip AND uri_path="/goform/formSetWANType_Wizard5" AND http_method=POST