CVE-2021-34268: St STM32CUBE Middleware

Medium severity, CVSS 4.6. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue in the USBH_ParseDevDesc() function of STMicroelectronics STM32Cube Middleware v1.8.0 and below causes a denial of service (DOS) via a malformed USB device packet.

Affected products

• St STM32CUBE Middleware: up to and including 1.8.0

Published 2021-07-22. Last modified 2026-06-17.