Semtech LR11xx Secure Boot Bypass_CVE-2025-14859

7 / 10

HIGH

CVSS:4.0/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

Description

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.

Basic Information

ID CVE-2025-14859

Source SWI

Published Apr 7, 2026 at 19:58

Modified Apr 7, 2026 at 20:42

Affected Product

Vendor Semtech

Product LR1110

Affected Versions Semtech LR1110 0
Semtech LR1120 0
Semtech LR1121 0

CWE Classification

CWE-327

References

www.semtech.com /company/security/security-bulletins/sem-psa-2026-001

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    "published": "2026-04-07T19:58:41.379Z",
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