CVE-2025-3873: Silabs.com Wiseconnect

Medium severity, CVSS 6.0. EPSS: 0.3% chance of exploitation in the next 30 days.

The following APIs for the Silcon Labs SiWx91x prior to vesion 3.4.0 failed to check the size of the output buffer of the caller which could lead to data corruption on the host (Cortex-M4) application. sl_si91x_aes sl_si91x_gcm sl_si91x_ccm sl_si91x_sha

Affected products

• Silabs.com Wiseconnect: from 3.0.0, before 3.4.0 (fixed in 3.4.0)

Published 2025-07-25. Last modified 2026-06-17.