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.
Advisories

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Fixes

Solution

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Workaround

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History

Tue, 07 Apr 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 07 Apr 2026 20:45:00 +0000

Type Values Removed Values 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.
Title Semtech LR11xx Memory Write Access Control Bypass
First Time appeared Semtech
Semtech lr1110
Semtech lr1120
Semtech lr1121
Weaknesses CWE-123
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': 5.4, 'vector': '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/AU:N/R:A/V:D/RE:M'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: SWI

Published:

Updated: 2026-04-07T20:42:41.466Z

Reserved: 2025-12-18T00:09:25.318Z

Link: CVE-2025-14857

cve-icon Vulnrichment

Updated: 2026-04-07T20:38:09.550Z

cve-icon NVD

Status : Received

Published: 2026-04-07T20:16:21.253

Modified: 2026-04-07T20:16:21.253

Link: CVE-2025-14857

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses