Gsma Fs.38 [exclusive] Jun 2026

The GSMA FS.38 specification includes several key features that ensure secure authentication and interoperability:

Compromised user credentials often stem from weak, insecure web portals. FS.38 addresses this by recommending rigorous authentication and security practices for these interfaces.

The document includes a dedicated section on testing, making recommendations for validating the security posture of SIP endpoints , SBCs, and provisioning servers. gsma fs.38

If you are currently auditing or upgrading your telecommunications infrastructure, I can help you advance your security strategy. Let me know: What of 4G/5G core deployment is your network in?

The FS.38 is not an abstract theoretical document. It provides concrete analysis of a wide range of potential security, privacy, and fraud attacks that can be launched using SIP against mobile and fixed-mobile converged (FMC) networks and their customers. Key threat categories covered in the guide include: The GSMA FS

: The rollout of Rich Communication Services (RCS) and inter-operator roaming introduced complex traffic flows prone to spoofing, toll fraud, and Denial of Service (DoS) attacks.

: Guidance on deploying Session Border Controllers (SBCs) and firewalls to monitor and filter SIP traffic. If you are currently auditing or upgrading your

Before FS.38, signaling security focused almost entirely on older telecom generation protocols. The implementation of FS.38 formally bridges the gap between classic telecom security and modern IP-network vulnerabilities, positioning SIP protection alongside established standards for SS7, Diameter, and 5G network protocols.

For years, telecom equipment manufacturers and software vendors defaulted to an all-inclusive answer during the procurement process: when asked if their systems were secure and optimized for performance, the response was nearly always a simple "Yes".

38, or should we look at how it maps to the ? FS.31 GSMA Baseline Security Controls Version 7.0