The Broadband Guide
search advanced

Port 5678 Details

known port assignments and vulnerabilities
threat/application/port search:
Port(s) Protocol Service Details Source
5678 tcp,udp rrac Port used by Linksys (and other) Cable/DSL Routers Remote Administration. Also used by MikroTik Neighbor Discovery protocol and n8n.

Vulnerable systems: Linksys Cable/DSL version 1.42.7 (BEFSR11 / BEFSR41 / BEFSRU31)
Immune systems: Linksys Cable/DSL versions prior to 1.42.7 (BEFSR11 / BEFSR41 / BEFSRU31)

SNATMAP server also uses this port to ensure that connections between iChat users can properly function behind network address translation (NAT).

Buffer overflow in the Nortel UNIStim IP Softphone 2050 allows remote attackers to cause a denial of service (application abort) and possibly execute arbitrary code via a flood of invalid characters to the RTCP port (5678/udp) that triggers a Windows error message, a.k.a. "extraneous messaging."
References: [CVE-2007-5636] [BID-26118]

WellinTech KingHistorian 3.0 allows remote attackers to execute arbitrary code or cause a denial of service (invalid pointer write) via a crafted packet to TCP port 5678.
References: [CVE-2012-2559]

Linksys EtherFast Cable/DSL BEFSR11, BEFSR41 and BEFSRU31 with the firmware 1.42.7 upgrade installed opens TCP port 5678 for remote administration even when the "Block WAN" and "Remote Admin" options are disabled, which allows remote attackers go gain access.
References: [CVE-2002-2159] [BID-4987]

A vulnerability has been identified in SIMATIC WinCC OA V3.14 and prior (All versions < V3.14-P021). Improper access control to a data point of the affected product could allow an unauthenticated remote user to escalate its privileges in the context of SIMATIC WinCC OA V3.14. This vulnerability could be exploited by an attacker with network access to port 5678/TCP of the SIMATIC WinCC OA V3.14 server. Successful exploitation requires no user privileges and no user interaction. This vulnerability could allow an attacker to compromise integrity and availability of the SIMATIC WinCC OA system. At the time of advisory publication no public exploitation of this vulnerability was known.
References: [CVE-2018-13799], [BID-105332]
5060, 5190, 5297, 5298, 5353, 5678, 16384-16403 udp applications iChat Portforward
5678 tcp threat Port 5678 is the default port for the com.hp.util.rcat Java package (from Hewlett-Packard). This is a simple debugging package. Bekkoame
5678 tcp,udp threat A frequent port some picks at random. Bekkoame
5678 tcp,udp threat A port for remote execution using the crexd/srexd services. Bekkoame
5678 udp threat osagent communication Bekkoame
5678 tcp,udp Port 5678 was originally specified for the PPTP protocol, but when the standard was ratified, port 1723 was chosen instead. Bekkoame
5678 tcp,udp rrac Remote Replication Agent Connection IANA
5500-5699 tcp applications MOHAA Reverend Portforward
9 records found
jump to:
previous next

Related ports: 555  2001  8001  1723  

« back to SG Ports

External Resources
SANS Internet Storm Center: port 5678

Port numbers in computer networking represent communication endpoints. Ports are unsigned 16-bit integers (0-65535) that identify a specific process, or network service. IANA is responsible for internet protocol resources, including the registration of commonly used port numbers for well-known internet services.
Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.

TCP ports use the Transmission Control Protocol, the most commonly used protocol on the Internet and any TCP/IP network. TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and that packets will be delivered in the same order in which they were sent. Guaranteed communication/delivery is the key difference between TCP and UDP.

UDP ports use the Datagram Protocol. Like TCP, UDP is used in combination with IP (the Internet Protocol) and facilitates the transmission of datagrams from one computer to applications on another computer, but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received the message to process any errors and verify correct delivery. UDP is often used with time-sensitive applications, such as audio/video streaming and realtime gaming, where dropping some packets is preferable to waiting for delayed data.

When troubleshooting unknown open ports, it is useful to find exactly what services/processes are listening to them. This can be accomplished in both Windows command prompt and Linux variants using the "netstat -aon" command. We also recommend runnig multiple anti-virus/anti-malware scans to rule out the possibility of active malicious software. For more detailed and personalized help please use our forums.

Please use the "Add Comment" button below to provide additional information or comments about port 5678.
  User Reviews/Comments:
by Twanislas - 2016-04-04 12:06
There is also :
5678/udp Mikrotik Neighbor Discovery Protocol
by secPet - 2023-03-03 10:41
iRobot Roomba app broadcast "irobotmcs" at udp 5678
News Glossary of Terms FAQs Polls Cool Links SpeedGuide Teams SG Premium Services SG Gear Store
Registry Tweaks Broadband Tools Downloads/Patches Broadband Hardware SG Ports Database Security Default Passwords User Stories
Broadband Routers Wireless Firewalls / VPNs Software Hardware User Reviews
Broadband Security Editorials General User Articles Quick Reference
Broadband Forums General Discussions
Advertising Awards Link to us Server Statistics Helping SG About