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CVE-2026-89410— Out-of-bounds read in Z-Wave NCP SPI Handler

Quick assessment

Affected
Silicon Labs Z-Wave SDK
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Z-Wave SDK 8.1.1 及更早版本中，一个格式错误的 NCP SPI 命令可能触发越界读取，从而泄露敏感信息。

CVSS 5.1 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-89410

Vulnerability Information
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Vulnerability Title
Out-of-bounds read in Z-Wave NCP SPI Handler
Source: CVE Program / CVE List V5
Vulnerability Description
In Z-Wave SDK 8.1.1 and earlier, a malformed NCP SPI command can trigger out-of-bounds reads that leak sensitive information.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1285
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Silicon Labs Z-Wave SDK 0 ~ 8.1.1 -

II. Public POCs for CVE-2026-89410

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III. Intelligence Information for CVE-2026-89410

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Other References for CVE-2026-89410 (1)

Same Patch Batch · Silicon Labs · 2026-10-22 · 8 CVEs total

CVE-2026-94502 7.5 HIGH Out-of-bounds write in Zigbee Publish Price Matrix handling
CVE-2026-85079 7.5 HIGH Out-of-bounds write in Zigbee Simple_Desc_req handling
CVE-2026-66279 7.2 HIGH Dis-connect vulnerability in Connect Stack
CVE-2026-85080 6.0 MEDIUM Authenticated Denial-of-Service in Zigbee GetGroupMembership Handling
CVE-2026-66281 6.0 MEDIUM Authenticated Denial-of-Service in Zigbee Discover Attributes Handling
CVE-2026-66282 6.0 MEDIUM Authenticated Denial-of-Service in Zigbee Publish Billing Period
CVE-2026-89409 5.3 MEDIUM Unvalidated ZWAVE_CMD_NODES_EXIST May Cause Deletion of End Nodes​

IV. Related Vulnerabilities

Same product: Z-Wave SDK
Same vendor: Silicon Labs
Same weakness: CWE-1285

V. Comments for CVE-2026-89410

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