TCP Port 4786 – smart-install

About TCP Port 4786

The Internet Assigned Numbers Authority (IANA) registers port 4786 for smart-install. The IANA description reads: ‘Smart Install Service’. This port appears in 8 IDS rules and does not have notable malware activity indicators in our data.

IDS Rule References

8 IDS / security rules reference TCP port 4786. Presence in IDS rules does not mean traffic on this port is malicious. These are patterns security tools monitor.

Rule categories (top 2): attempted-admin (5), bad-unknown (3).

Sample rule descriptions for TCP port 4786:

• SERVER-OTHER Cisco IOS Smart Install protocol backup config command attempt
• SERVER-OTHER Cisco IOS Smart Install protocol download config command attempt
• SERVER-OTHER Cisco IOS Smart Install protocol download image command attempt
• SERVER-OTHER Cisco IOS Smart Install protocol version command attempt
• ET EXPLOIT Possible CVE-2018-0171 Exploit (PoC based)

Data Sources

This information is compiled from: IANA Service Name and Transport Protocol Port Number Registry, Emerging Threats Open Ruleset (BSD 2-Clause / GPLv2 per SID range), and Snort Community Rules (GPLv2).