---
id: CVE-2026-89410
title: Out-of-bounds read in Z-Wave NCP SPI Handler
summary: >-
  In Z-Wave SDK 8.1.1 and earlier, a malformed NCP SPI command can trigger
  out-of-bounds reads that leak sensitive information.
severity: medium
cvss: 5.1
cvssVector: 'CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-1285
vendor: Silicon Labs
product: Z-Wave SDK
affected:
  - z-wave_sdk <= 8.1.1
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T16:24:49.565Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89410'
references:
  - url: >-
      https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000592.md
tags:
  - cve.org
ingestedAt: '2026-10-22T22:00:50.343Z'
---

## Overview

In Z-Wave SDK 8.1.1 and earlier, a malformed NCP SPI command can trigger out-of-bounds reads that leak sensitive information.

## Affected

- `z-wave_sdk <= 8.1.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.