CVE-2025-14857
Semtech LR11xx Memory Write Access Control Bypass
Description
An improper access control vulnerability exists in Semtech LoRa LR11xxx transceivers running early versions of firmware where the memory write command accessible via the physical SPI interface fails to enforce write protection on the program call stack. An attacker with physical access to the SPI interface can overwrite stack memory to hijack program control flow and achieve limited arbitrary code execution. However, the impact is limited to the active attack session: the device's secure boot mechanism prevents persistent firmware modification, the crypto engine isolates cryptographic keys from direct firmware access, and all modifications are lost upon device reboot or loss of physical access.
INFO
Published Date :
April 7, 2026, 8:16 p.m.
Last Modified :
July 24, 2026, 11:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-14857
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update device firmware to the latest version.
- Restrict physical access to the SPI interface.
- Reboot device to clear potential modifications.
Public PoC/Exploit Available at Github
CVE-2025-14857 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-14857.
| URL | Resource |
|---|---|
| https://www.semtech.com/company/security/security-bulletins/sem-psa-2026-001 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-14857 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-14857
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
sobre
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-14857 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-14857 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: LR11xx de Semtech, Description: Una vulnerabilidad de control de acceso inadecuado existe en los transceptores Semtech LoRa LR11xxx que ejecutan versiones tempranas de firmware donde el comando de escritura de memoria accesible a través de la interfaz SPI física no logra aplicar la protección contra escritura en la pila de llamadas del programa. Un atacante con acceso físico a la interfaz SPI puede sobrescribir la memoria de la pila para secuestrar el flujo de control del programa y lograr una ejecución de código arbitrario limitada. Sin embargo, el impacto se limita a la sesión de ataque activa: el mecanismo de arranque seguro del dispositivo evita la modificación persistente del firmware, el motor criptográfico aísla las claves criptográficas del acceso directo al firmware, y todas las modificaciones se pierden al reiniciar el dispositivo o al perder el acceso físico. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Semtech', 'modules': ['firmware'], 'product': 'LR1110', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': 'TRX FW 0x0402', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Semtech', 'product': 'LR1120', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': 'TRX FW 0x0202', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Semtech', 'product': 'LR1121', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': 'TRX FW 0x0104', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2025-14857', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-04-07T20:31:21.612362Z'} -
New CVE Received by [email protected]
Apr. 07, 2026
Action Type Old Value New Value Added Description An improper access control vulnerability exists in Semtech LoRa LR11xxx transceivers running early versions of firmware where the memory write command accessible via the physical SPI interface fails to enforce write protection on the program call stack. An attacker with physical access to the SPI interface can overwrite stack memory to hijack program control flow and achieve limited arbitrary code execution. However, the impact is limited to the active attack session: the device's secure boot mechanism prevents persistent firmware modification, the crypto engine isolates cryptographic keys from direct firmware access, and all modifications are lost upon device reboot or loss of physical access. Added CVSS V4.0 AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:D/RE:M/U:X Added CWE CWE-123 Added Reference https://www.semtech.com/company/security/security-bulletins/sem-psa-2026-001