Researchers Report 84 Flaws in 4G and 5G Cores, Including a Session Hijacking Flaw

The Hacker News

July 31, 2026 at 11:55 AM

Overview

A recent study from researchers at Nanyang Technological University in Singapore has uncovered 84 security vulnerabilities in 4G and 5G core networks. These flaws could allow attackers to launch denial-of-service (DoS) attacks and even hijack user sessions, potentially giving them control over network communications. This is particularly concerning as mobile networks are foundational to modern communication, affecting millions of users globally. The implications of these vulnerabilities could disrupt services and compromise user privacy, making it crucial for network operators to address these issues promptly. As mobile technology continues to evolve, ensuring the security of 4G and 5G infrastructures is more important than ever.

Key Takeaways

Affected Systems: 4G and 5G core networks, mobile network operators
Action Required: Network operators should assess their systems for the identified vulnerabilities and apply necessary patches or updates as they become available.
Timeline: Newly disclosed

Original Article Summary

An academic study has disclosed a "widespread class" of security vulnerabilities impacting 4G and 5G core networks that, if successfully exploited, could trigger denial-of-service (DoS) attacks and even session hijacking, allowing an attacker to seize control of a user's network session. The findings have been released by a group of researchers from Singapore's Nanyang Technological University

Impact

4G and 5G core networks, mobile network operators

Exploitation Status

The exploitation status is currently unknown. Monitor vendor advisories and security bulletins for updates.

Timeline

Newly disclosed

Remediation

Network operators should assess their systems for the identified vulnerabilities and apply necessary patches or updates as they become available.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

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