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Port 7547 Details

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Port(s) Protocol Service Details Source
7547 tcp tr069 CPE WAN Management Protocol Technical Report 069 uses port 7547 (TCP/UDP).

Port associated with TR-069 - application layer protocol for remote management of end-user devices. It is a bidirectional SOAP/HTTP-based protocol that provides communication between CPE devices and auto-configuration servers (ACS). It can be used by some modems, gateways, routers, VoIP phones, set-top boxes. TR-069 has some known exploits as demonstrated at the DEFCON22 conference.

If your NAT router/gateway keeps this port open and you are sure you want to filter it (potential interference with ISPs pushing firmware updates), try the following. Navigate to your router's admin interface and disable TR-069. If that does not work, look under "port forwarding", or "virtual servers", and forward the port to an unused local IP address, like (

The Eir D1000 modem does not properly restrict the TR-064 protocol, which allows remote attackers to execute arbitrary commands via TCP port 7547, as demonstrated by opening WAN access to TCP port 80, retrieving the login password (which defaults to the Wi-Fi password), and using the NewNTPServer feature.
References: [CVE-2016-10372], [XFDB-126658]

IANA registered for: Broadband Forum CWMP (TCP/UDP)
7547 tcp,udp cwmp DSL Forum CWMP, registered 2006-01 IANA
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External Resources
SANS Internet Storm Center: port 7547

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.

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