Out-of-bounds read in Z-Wave NCP SPI Handler

published 2026-10-22 18 d ago modified 2026-10-23 17 d ago also EUVD-2026-108187

cvss: 5.1; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits: 0; none known

In Z-Wave SDK 8.1.1 and earlier, a malformed NCP SPI command can trigger out-of-bounds reads that leak sensitive information.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 17 d ago (2026-10-23)

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.1	CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CNA	4.0	5.1	CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

Silicon Labs Z-Wave SDK

Classification

Weakness

CWE-1285 Improper Validation of Specified Index, Position, or Offset in Input

References

github.com /SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000592.md
vendor-advisory

Sources

CVE List CVE-2026-89410
NVD CVE-2026-89410

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Summary