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CVE-2026-89409

Unvalidated ZWAVE_CMD_NODES_EXIST May Cause Deletion of End Nodes​

MEDIUM
5.3
CVSS Score
Published: October 22, 2026 at 01:50 PM UTC
Updated: October 22, 2026 at 07:18 PM UTC
1 product affected across 1 vendorZ-Wave SDK

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000591.md

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMSilabs
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-940

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