TCP Port 55443

About TCP Port 55443

Port 55443 has no formal IANA registration. This port falls within the dynamic/private port range, which IANA explicitly does not register; these ports are intended for ephemeral or temporary use. It is referenced in 3 IDS rules but does not exhibit malware activity indicators in our data.

IDS Rule References

3 IDS / security rules reference TCP port 55443. Presence in IDS rules does not mean traffic on this port is malicious. These are patterns security tools monitor.

Rule categories (top 2): successful-admin (2), attempted-admin (1).

Sample rule descriptions for TCP port 55443:

• ET EXPLOIT Possible Cisco REST API Container for Cisco IOS XE Software Authentication Bypass Attempt (CVE-2019-12643)
• ET EXPLOIT Cisco REST API Container for Cisco IOS XE Software Authentication Bypass – Successful Exploit (CVE-2019-12643)
• ET EXPLOIT Cisco REST API Container for Cisco IOS XE Software Authentication Bypass – Token Usage (CVE-2019-12643)

Data Sources

This information is compiled from: Emerging Threats Open Ruleset (BSD 2-Clause / GPLv2 per SID range).