CVE-2025-14857

MEDIUM EPSS 15.4%

Published Apr 7, 20262mo ago · Modified Jun 17, 20261w ago

5.4 CVSS 4.0

Medium

Published Apr 7, 2026 2mo ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

5.4

Exploitability

—

Impact

—

Vector string

CVSS:4.0/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

Attack Vector Physical

Attack Complexity Low

Privileges Required None

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

15.4% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-123

References 1

semtech.com https://www.semtech.com/company/security/security-bulletins/sem-psa-2026-001

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.