Medium severity · published Oct 22, 2026
CVE-2026-89409
Unvalidated ZWAVE_CMD_NODES_EXIST May Cause Deletion of End Nodes
New
5.3
CVSS
0.3%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZS
Z-Wave SDK · Silicon Labs
7.0.0 through 8.1.1; through 6.85.02 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89409
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-89409
github.com
https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000591.md
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