P4Verified

CVE-2021-42553: stm32 mw usb host before 3.5.1 (exclusive); +1 more affected products

CVE-2021-42553. CVSS 3.1 base score 9.8 (CRITICAL, NVD). EPSS 0.0106 (percentile 0.63504), scored 2026-10-08.

Affected technology

stm32 mw usb host · before 3.5.1 (exclusive)
st

STM32 USB Host Library · all to before 3.5.1
STMicroelectronics STM32Cube

Description’s affected range: versions before 3.5.1

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Physical access · No privileges required · No user interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An attacker can execute arbitrary code when the descriptor contains more endpoints than USBH_MAX_NUM_ENDPOINTS. Vendor/CNA’s CVSS 3.1 assessment (base score 6.8/10) rates confidentiality, integrity and availability impact as high. NVD’s CVSS 3.1 assessment (base score 9.8/10) rates confidentiality, integrity and availability impact as high.

Published 2026-10-08 18:35:28.217110+00:00

CWE: CWE-120
CCR priority: 39.5 /100 (P4)
CVSS 3.1: 9.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · NVD
EPSS: 0.0106 · percentile 0.63504 · 2026-10-08
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-08 18:34:48.508309+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2021-42553.html