CVE-2025-14859

Semtech LR11xx Secure Boot Bypass

Published Apr 7, 2026 CVSS 4.0 · 7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
SWI
Published
Updated
Apr 7, 2026, 8:42 PM
Reserved
Dec 18, 2025, 12:09 AM
Status
Awaiting Analysis
Published
Apr 7, 2026, 8:16 PM
Modified
Jul 24, 2026, 11:10 PM