CVE-2025-14859
HIGH EPSS 1.5%
Published Apr 7, 20262mo ago · Modified Jun 17, 20262w ago
7.0 CVSS 4.0
Published Apr 7, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago
Description
The Semtech LR11xx LoRa transceivers implement secure boot functionality using digital signatures to authenticate firmware. However, the implementation uses a non-standard cryptographic hashing algorithm that is vulnerable to second preimage attacks. An attacker with physical access to the device can exploit this weakness to generate a malicious firmware image with a hash collision, bypassing the secure boot verification mechanism and installing arbitrary unauthorized firmware on the device.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:P/AC:L/AT:N/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:I/V:C/RE:M/U:X Attack Vector Physical
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
1.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-327
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.