TELCOSEC BLOG: Vulnerability Disclosures and Technical Analysis
Vulnerability Disclosures & Technical Analysis
Regularly updated with vulnerability disclosures on 5G Core (SBA), Diameter routing loops, and baseband-level RCE.
Technical Research Scope
The TelcoSec research collective focuses on high-severity, systemic vulnerabilities affecting telecommunications infrastructure worldwide. Our investigative scope spans the entirety of modern cellular networks, from the radio access network (RAN) to the core switching routing nodes and central subscriber databases. Specifically, we investigate physical and software baseband firmware implementations (including baseband-level remote code execution), non-access stratum (NAS) signaling protocol parsing, and the security boundaries of virtualized 5G Service Based Architectures (SBA). Our teams analyze GTP-C and GTP-U encapsulations, SS7/Diameter routing loops, and the cryptographic strength of radio interfaces (such as A5/3, SNOW 3G, and AES-based algorithms).
Our diagnostic methodologies rely on a combination of black-box fuzzing, firmware reverse engineering, and hardware-in-the-loop simulation. We actively build custom emulation harnesses for baseband operating systems to identify memory corruption bugs and validation bypasses. Testing is conducted strictly within controlled laboratory environments using RF-shielded enclosures, Faraday cages, and licensed software-defined radio configurations. This guarantees zero leakage of signal transmissions and ensures that no operational commercial network bands or subscriber equipment are impacted during our active research assessments.
Responsible Disclosure & Impact
We are committed to the principles of Coordinated Vulnerability Disclosure (CVD) to protect global telecom infrastructure. All identified defects, signaling weaknesses, and zero-day threat vectors are documented with high-fidelity reproduction steps and submitted securely to the impacted mobile network operators, vendors, or the GSMA Coordinated Vulnerability Disclosure program. We grant a standard remediation window of 90 days, which can be extended under active collaboration, before releasing public write-ups, vulnerability reports, or proof-of-concept indicators.
Through these rigorous practices, our aim is to foster transparency while protecting the privacy of billions of cellular subscribers globally. By collaborating directly with carrier security groups, standards organizations, and red teams, we translate academic-grade research into actionable defense mechanisms, ensuring that network operators can preemptively identify and mitigate complex signaling and baseband exploits before they are utilized by state-level threat groups.
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