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.

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History

Tue, 07 Apr 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 07 Apr 2026 20:45:00 +0000

Type Values Removed Values Added
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.
Title Semtech LR11xx Secure Boot Bypass
First Time appeared Semtech
Semtech lr1110
Semtech lr1120
Semtech lr1121
Weaknesses CWE-327
CPEs cpe:2.3:a:semtech:lr1110:*:*:*:*:*:*:*:*
cpe:2.3:a:semtech:lr1120:*:*:*:*:*:*:*:*
cpe:2.3:a:semtech:lr1121:*:*:*:*:*:*:*:*
Vendors & Products Semtech
Semtech lr1110
Semtech lr1120
Semtech lr1121
References
Metrics cvssV4_0

{'score': 7, 'vector': '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'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: SWI

Published:

Updated: 2026-04-07T20:42:41.142Z

Reserved: 2025-12-18T00:09:40.606Z

Link: CVE-2025-14859

cve-icon Vulnrichment

Updated: 2026-04-07T20:37:44.923Z

cve-icon NVD

Status : Received

Published: 2026-04-07T20:16:22.590

Modified: 2026-04-07T20:16:22.590

Link: CVE-2025-14859

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses