Gsma Fs.38 May 2026

Provides the overarching "Baseline Security Controls" for the entire mobile ecosystem.

Offers recommendations for interconnect signaling security, which have been updated to align with the SIP guidelines in FS.38. gsma fs.38

As the telecommunications industry transitions from legacy signaling protocols (like SS7) toward IP-based systems, SIP has become the backbone for voice and multimedia services, including and 5G Voice . FS.38 addresses the unique vulnerabilities introduced by this shift, offering a comprehensive guide to identifying and mitigating SIP-based threats. Key Focus Areas Addresses risks associated with the interception or exposure

Focuses on protecting network infrastructure, such as Session Border Controllers (SBCs) and core network nodes, from unauthorized access and denial-of-service (DoS) attacks. including and 5G Voice .

By adhering to FS.38, operators can better defend against emerging "all-IP" threats, ensuring that as networks become more open and virtualized, they remain resilient against both traditional and sophisticated cyberattacks.

Addresses risks associated with the interception or exposure of subscriber identity and metadata within SIP signaling.