Vulnerability · Published Oct 22, 2026 · Assigned by Silabs
CVE-2026-89409Unvalidated ZWAVE_CMD_NODES_EXIST May Cause Deletion of End Nodes
Medium 5.3
In plain English
A medium-severity security flaw in Z-Wave SDK from Silicon Labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).
Severity (CVSS 4.0)5.3Medium
Exploit odds (30 days)0.3%top 80.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Silicon Labs | Z-Wave SDK | 7.0.0 – through 8.1.10 – through 6.85.02 |
Weakness: CWE-940 · 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