---
id: CVE-2025-14858
title: >-
  The Semtech LR11xx LoRa transceivers running early versions of firmware
  contains an information disclosure vulnerability in its firmware validation
  functionality
summary: >-
  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…
severity: none
cwe:
  - CWE-226
published: '2026-04-07'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-14858'
references:
  - url: >-
      https://www.semtech.com/company/security/security-bulletins/sem-psa-2026-001
    label: security@sierrawireless.com
tags:
  - nvd
epss: 0.00113
epssPercentile: 0.01288
ingestedAt: '2026-07-25T23:05:57.767Z'
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.