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CVE-2026-89409— Unvalidated ZWAVE_CMD_NODES_EXIST May Cause Deletion of End Nodes​

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（适用于 700/800 系列设备）以及 6.85.02 及更早版本（适用于 500 系列设备）中，由于 处理器缺少必要的检查，可能导致节点被从网络中移除。此类消息必须来自已经加入网络的设备。

CVSS 5.3 · Medium
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I. Basic Information for CVE-2026-89409

Vulnerability Information
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Vulnerability Title
Unvalidated ZWAVE_CMD_NODES_EXIST May Cause Deletion of End Nodes​
Source: CVE Program / CVE List V5
Vulnerability Description
In Z-Wave SDK 8.1.1 and earlier (for 700/800 series devices) and 6.85.02 and earlier (for 500 series devices), missing checks in the ZWAVE_CMD_NODES_EXIST handler can result in nodes being removed from the network. These messages must come from a device that has already joined the network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通信信道源的不正确验证
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Silicon Labs Z-Wave SDK 7.0.0 ~ 8.1.1 -

II. Public POCs for CVE-2026-89409

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III. Intelligence Information for CVE-2026-89409

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Other References for CVE-2026-89409 (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-2026-89410 5.1 MEDIUM Out-of-bounds read in Z-Wave NCP SPI Handler

IV. Related Vulnerabilities

Same product: Z-Wave SDK
Same vendor: Silicon Labs
Same weakness: CWE-940

V. Comments for CVE-2026-89409

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