5G-Shark Lures Phones to Rogue 5G Cells Without Network Jamming
Researchers have developed 5G-Shark to lure phones onto rogue base stations, collect subscriber IDs, force network downgrades and trigger service disruptions.
Security researchers have developed a method that can pull nearby 5G phones onto a rogue base station without jamming the legitimate network or broadcasting malformed radio messages.
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The method, named 5G-Shark, manipulates the standard cell-reselection process used by phones to choose between available mobile cells. Researchers used it to collect subscriber identifiers, track devices through temporary identifiers, force connections onto older network generations and trigger denial-of-service (DoS) attacks.
The research was published on 21 September 2026 by Oscar Lasierra, Gines Garcia-Aviles, Antonio Skarmeta and Xavier Costa-Pérez. The authors are affiliated with the i2CAT Foundation, University of Murcia, NEC Laboratories Europe and ICREA.
How 5G-Shark Attracts Nearby Phones
5G-Shark observes network information broadcast by the real operator and configures its rogue cell with matching operator identifiers, frequencies...
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