CVE-2025-14859: Semtech LR1110

High severity, CVSS 7.0. EPSS: 0.1% chance of exploitation in the next 30 days.

The Semtech LR11xx LoRa transceivers implement secure boot functionality using digital signatures to authenticate firmware. However, the implementation uses a non-standard cryptographic hashing algorithm that is vulnerable to second preimage attacks. An attacker with physical access to the device can exploit this weakness to generate a malicious firmware image with a hash collision, bypassing the secure boot verification mechanism and installing arbitrary unauthorized firmware on the device.

Affected products

• Semtech LR1110
• Semtech LR1120
• Semtech LR1121

Published 2026-04-07. Last modified 2026-07-24.