CVE-2020-9057: Linear Wadwaz-1

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Z-Wave devices based on Silicon Labs 100, 200, and 300 series chipsets do not support encryption, allowing an attacker within radio range to take control of or cause a denial of service to a vulnerable device. An attacker can also capture and replay Z-Wave traffic. Firmware upgrades cannot directly address this vulnerability as it is an issue with the Z-Wave specification for these legacy chipsets. One way to protect against this vulnerability is to use 500 or 700 series chipsets that support Security 2 (S2) encryption. As examples, the Linear WADWAZ-1 version 3.43 and WAPIRZ-1 version 3.43 (with 300 series chipsets) are vulnerable.

Affected products

• Linear Wadwaz-1: version 3.43 only
• Linear Wapirz-1: version 3.43 only
• Silabs 100 Series Firmware: any version
• Silabs 200 Series Firmware: any version
• Silabs 300 Series Firmware: any version

Published 2022-01-10. Last modified 2026-06-17.