CVE-2025-14857

Semtech LR11xx Memory Write Access Control Bypass

Published Apr 7, 2026 CVSS 4.0 · 5.4 Medium EPSS < 1% KEV · Not listed
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.

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 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'}

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