Telecom Attack Surface Mapping

Telecom attack surface mapping is the systematic discovery and documentation of every externally and internally reachable network element, interface, protocol, and service in an operator's environment. It covers IT assets, signalling endpoints (SS7/Diameter/GTP/SIP/N32), RAN management, OAM, and cloud surfaces, and is the foundation for prioritised hardening and continuous exposure management.

Categories: Radio Access NetworkSignalingRoaming and Interconnect

Telecom Attack Surface Mapping in context

The radio access network is the layer where mobile devices attach to the operator's infrastructure. Attacks in this layer include IMSI catching, rogue base stations, downgrade attacks and jamming, and defenses hinge on mutual authentication, integrity-protected signaling and Open RAN supply-chain hygiene.

Signaling protocols carry the control-plane instructions that set up calls, register subscribers, hand over sessions and route SMS. SS7, Diameter, GTP-C and SIP are the four dominant families, and interconnect exposure of any of them is treated by GSMA FS.11 / FS.19 / FS.20 as a top-tier telecom risk.

To place Telecom Attack Surface Mapping in the wider telecom-security picture, review Threat Modeling, PLMN, PSTN, Certification Authority (CA), Firewall and Interconnect Security Model.

Related terms

Related topic hubs

  • Signaling Firewall Unified SS7/Diameter/GTP/SMS signaling firewall framework.
  • SS7 Security SS7/MAP/CAP/SCCP attacks and defenses across 2G/3G interconnect.
  • SS7 Firewall GSMA FS.11 category 1/2/3 SS7 message screening at the STP edge.
  • Roaming Security IPX/GRX interconnect risk, home-routed vs local-breakout, SEPP.

More from the TelcoSec Glossary

Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.