CVE-2026-89409 PUBLISHED

Unvalidated ZWAVE_CMD_NODES_EXIST May Cause Deletion of End Nodes

Assigner: Silabs
Reserved: 11.09.2026 Published: 22.10.2026 Updated: 22.10.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Silicon Labs
Product	Z-Wave SDK
Versions	Default: unaffected affected from 7.0.0 to 8.1.1 (incl.) affected from 0 to 6.85.02 (incl.)

References

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

Problem Types

CWE-940 Improper Verification of Source of a Communication Channel CWE

Impacts

CAPEC-115 Authentication Bypass, CAPEC-176 Configuration/Environment Manipulation