# Malicious SIM Cards Can Execute Code on Cellular IoT Modems

Researchers have found that a malicious SIM card can exploit a vulnerability to run attacker-controlled code on the modem of cellular IoT devices. This undermines the device's security and could allow long-term stealthy compromise. The issue is notable because it targets the foundational connectivity layer of many embedded systems.

**Importance:** 3/5

## Sources

### Security
- [The Hacker News](https://thehackernews.com/2026/08/a-malicious-sim-card-can-run-attacker.html) — Tue, 11 Aug 2026 17:35:03 +0530