Port 480493GPP Cell Broadcast Service Protocol (CBSP)

CBSP carries cell-broadcast control and status messages between a Cell Broadcast Centre and a cellular base-station system.

inNetwork Services Mobile

transport: tcp
in transit: cleartext
assignment: official
risk: 6/10
lookups: 0

also known as 3gpp-cbsp, CBSP, Cell Broadcast Service Protocol

Technical Details

what runs on :48049

TCP port 48049 is assigned to CBSP, the CBC-to-base-station-system protocol specified in 3GPP TS 48.049. A TCP connection carries typed, length-delimited CBSP messages with information elements; operations include writing or replacing a broadcast, cancelling one, and querying status. CBSP is application-layer control traffic, not an encrypted protocol by default; deployments use operator-network protections or separate IP-layer security.

Security Information

exposure of :48049

risk score

6/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

network services averages 2.6 across 2,026 ports — this one sits 3.4 above.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

An internet-reachable CBSP endpoint would expose cellular broadcast control traffic: a party able to communicate with a trusted peer could potentially disrupt, cancel, or initiate broadcasts, depending on the endpoint's checks. Keep it on a restricted mobile-operator network and use network-layer protections; it should not be exposed directly to the internet. No specific widely exploited vulnerability is known from the registry information.

Record

iana registry entry

port: :48049
service: 3GPP Cell Broadcast Service Protocol (CBSP)
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 6/10risk
category: Network Services Mobile
usage: Mobile network operators use CBSP between a Cell Broadcast Centre (CBC) and a base-station system to manage and deliver cell broadcasts. It is a specialized operator-network protocol, not a service normally exposed to the public internet.
lookups: 0rank 993
added: 2026-10-21
updated: 2026-10-21
references: IANA service name registry — port 48049

Something wrong?

This record is maintained by the engineers who use port 48049. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-21.

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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :480493GPP Cell Broadcast Service Protocol (CBSP)

Technical Details

Security Information

Related Ports

Port 480493GPP Cell Broadcast Service Protocol (CBSP)