← Port Encyclopedia
1521
Oracle
TCP
Database
Critical Risk
Oracle Database listener — TNS listener, SQL injection, listener poisoning
🔍 How to Scan Port 1521
nmap -sV -p 1521 target
nmap -sV -sC --script=banner -p 1521 target
nc -zv target 1521
🛡️ Security Considerations
- Scan port 1521 with
nmap -sVto identify the exact service and version - If Oracle is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit oracleto find known exploits - Monitor traffic on port 1521 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation