Malicious SIM Cards Can Execute Code in Cellular IoT Modems

Thu, 13 Aug 2026 11:57:16 +0000

Engineer — Learn: Novel attack class relevant to anyone deploying cellular IoT modules (EV chargers, industrial routers, telematics): a rogue SIM can fully compromise the host module. No exploitation in the wild and no patch guidance yet; audit your SIM supply chain and cellular module vendors if you run these devices.
SOC/IR — Learn: The attack requires a malicious SIM — no published IOCs, TTPs, or detection surface exist yet. Worth tracking for future detection engineering on cellular IoT assets, but no hunt or rule work is actionable today.
Leader — Learn: If your organization operates EV charging, fleet telematics, or industrial cellular gateways, this research is worth adding to the IoT/OT risk register; no active exploitation means no immediate escalation, but SIM supply chain should be on the next vendor risk review cycle.

Sim-Attack on CuraSec