CVE-2025-2618
📋 TL;DR
A critical heap-based buffer overflow vulnerability in D-Link DAP-1620 access points allows remote attackers to execute arbitrary code or crash the device. This affects DAP-1620 firmware version 1.03 via manipulation of the set_ws_action function in the path handler component. The vulnerability impacts end-of-life products no longer supported by the vendor.
💻 Affected Systems
- D-Link DAP-1620
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, network infiltration, and persistent backdoor installation.
Likely Case
Device crash causing denial of service and potential network disruption for connected clients.
If Mitigated
Limited impact if device is isolated behind firewalls with strict network segmentation.
🎯 Exploit Status
Exploit details have been publicly disclosed, making weaponization likely. The buffer overflow manipulation is straightforward for attackers with basic reverse engineering skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: https://www.dlink.com/
Restart Required: No
Instructions:
No official patch available as this is an end-of-life product. The vendor no longer provides security updates for this model.
🔧 Temporary Workarounds
Network Isolation
allIsolate affected devices in separate VLANs with strict firewall rules to prevent external access.
Disable Web Services API
allDisable the vulnerable /dws/api/ endpoint if possible through device configuration.
🧯 If You Can't Patch
- Immediately replace affected DAP-1620 devices with supported models
- Implement strict network segmentation and firewall rules to block all traffic to the vulnerable API endpoint
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface at http://[device-ip]/info.html or via SSH if enabled. Look for version 1.03.Check Version:
curl -s http://[device-ip]/info.html | grep -i firmwareVerify Fix Applied:
Since no patch exists, verification involves confirming device replacement or network controls are in place.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to /dws/api/ endpoint
- Device crash/reboot logs
- Memory allocation errors in system logs
Network Indicators:
- HTTP traffic to port 80/443 containing buffer overflow patterns in set_ws_action parameters
- Sudden device unavailability on network
SIEM Query:
source="firewall" AND (dest_port=80 OR dest_port=443) AND url_path="/dws/api/" AND http_method="POST"🔗 References
- https://vuldb.com/?ctiid.300620
- https://vuldb.com/?id.300620
- https://vuldb.com/?submit.518963
- https://witty-maiasaura-083.notion.site/D-link-DAP-1620-set_ws_action-Vulnerability-1afb2f2a6361804e86dcde1e78ea2a8e
- https://www.dlink.com/
- https://witty-maiasaura-083.notion.site/D-link-DAP-1620-set_ws_action-Vulnerability-1afb2f2a6361804e86dcde1e78ea2a8e
