CVE-2025-44023
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on affected D-Link network-attached storage (NAS) devices by exploiting improper input validation in the account management CGI component. Attackers can change the admin password without proper authentication, potentially leading to full system compromise. This affects D-Link DNS-320 and DNS-320LW devices running specific vulnerable firmware versions.
💻 Affected Systems
- D-Link DNS-320
- D-Link DNS-320LW
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with persistent backdoor installation, data theft, ransomware deployment, and use as pivot point for lateral movement within the network.
Likely Case
Unauthorized admin password change leading to device compromise, data exfiltration, and potential use in botnets or as attack launchpad.
If Mitigated
Limited impact with proper network segmentation, but still represents authentication bypass vulnerability.
🎯 Exploit Status
Exploit involves sending crafted HTTP POST requests to account_mgr.cgi endpoint. No authentication required for exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Check D-Link support site for firmware updates. Consider replacing with supported devices if no patch is forthcoming.
🔧 Temporary Workarounds
Disable Web Management Interface
linuxDisable the web administration interface if not required for operation
Access device settings via SSH or serial console and disable web interface in configuration
Network Segmentation
linuxIsolate affected devices from internet and restrict network access
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Immediately isolate affected devices from internet-facing networks
- Implement strict network access controls allowing only necessary traffic to/from these devices
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface (System Status) or SSH command: cat /etc/versionCheck Version:
cat /etc/versionVerify Fix Applied:
Test if account_mgr.cgi endpoint still accepts unauthorized password change requests📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /cgi-bin/account_mgr.cgi with cgi_chg_admin_pw parameter
- Failed or successful admin password change events from unexpected IPs
Network Indicators:
- Unusual HTTP traffic to port 80/443 targeting CGI endpoints
- Outbound connections from NAS to unknown external IPs
SIEM Query:
source="nas_logs" AND (uri="/cgi-bin/account_mgr.cgi" OR message="admin password")