{"id":"CVE-2026-89409","title":"Unvalidated ZWAVE_CMD_NODES_EXIST May Cause Deletion of End Nodes​","summary":"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 co…","severity":"medium","cvss":5.3,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-940"],"vendor":"Silicon Labs","product":"Z-Wave SDK","affected":["z-wave_sdk >= 7.0.0 <= 8.1.1","z-wave_sdk <= 6.85.02"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-22T18:26:12.932750Z"},"published":"2026-10-22","updated":"2026-10-22","sourceUpdated":"2026-10-22T19:00:32.048Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89409","references":[{"url":"https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000591.md"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T22:00:50.374Z","slug":"CVE-2026-89409","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `z-wave_sdk >= 7.0.0 <= 8.1.1`\n- `z-wave_sdk <= 6.85.02`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}