CVE-2025-14858

Semtech LR11xx Encrypted Firmware Disclosure

Published Apr 7, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
The Semtech LR11xx LoRa transceivers running early versions of firmware contains an information disclosure vulnerability in its firmware validation functionality. When a host issues a firmware validity check command via the SPI interface, the device decrypts the provided encrypted firmware package block-by-block to validate its integrity. However, the last decrypted firmware block remains uncleared in memory after the validation process completes. An attacker with access to the SPI interface can subsequently issue memory read commands to retrieve the decrypted firmware contents from this residual memory, effectively bypassing the firmware encryption protection mechanism. The attack requires physical access to the device's SPI interface.

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 running early versions of firmware contains an information disclosure vulnerability in its firmware validation functionality. When a host issues a firmware validity check command via the SPI interface, the device decrypts the provided encrypted firmware package block-by-block to validate its integrity. However, the last decrypted firmware block remains uncleared in memory after the validation process completes. An attacker with access to the SPI interface can subsequently issue memory read commands to retrieve the decrypted firmware contents from this residual memory, effectively bypassing the firmware encryption protection mechanism. The attack requires physical access to the device's SPI interface.
Title Semtech LR11xx Encrypted Firmware Disclosure
First Time appeared Semtech
Semtech lr1110
Semtech lr1120
Semtech lr1121
Weaknesses CWE-226
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': 5.1, 'vector': 'CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/AU:N/R:A/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