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

July 31, 2026 · The Hacker News · Severity: HIGH

An academic study from Nanyang Technological University has disclosed 84 security vulnerabilities in 4G and 5G core networks. These flaws could be exploited to launch denial-of-service attacks or hijack user network sessions, posing a significant risk to mobile communications.

Key Takeaways

  • Academic study reveals 84 flaws in 4G/5G core networks.
  • Flaws enable denial-of-service attacks and session hijacking.
  • Researchers from Nanyang Technological University discovered the vulnerabilities.
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