PT-2026-30996 · Semtech · Lr1110+2

Published 2026-04-07 · Updated 2026-04-07 · CVE-2025-14859

Mitre

CVSS v4.0

7.0

High

AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/AU:N/R:I/V:C/RE:M

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.

Fix

Use of a Broken Cryptographic Algorithm

Weakness Enumeration

CWE-327

Related Identifiers

CVE-2025-14859

Affected Products

Lr1110

Lr1120

Lr1121

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2025-14859 · Security Note
• https://semtech.com/company/security/security-bulletins/sem-psa-2026-001 · Note