CVE-2021-42553

A buffer overflow vulnerability in stm32_mw_usb_host of STMicroelectronics in versions before 3.5.1 allows an attacker to execute arbitrary code when the descriptor contains more endpoints than USBH_MAX_NUM_ENDPOINTS. The library is typically integrated when using a RTOS such as FreeRTOS on STM32 MCUs.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.9 / Impact : 5.9

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/STMicroelectronics/stm32_mw_usb_host	Product
https://github.com/STMicroelectronics/stm32_mw_usb_host/pull/4	Patch Third Party Advisory
https://github.com/STMicroelectronics/stm32_mw_usb_host	Product
https://github.com/STMicroelectronics/stm32_mw_usb_host/pull/4	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:st:stm32_mw_usb_host:*:*:*:*:*:*:*:*

History

08 Oct 2026, 18:23

Type	Values Removed	Values Added
References	~~() https://github.com/STMicroelectronics/stm32_mw_usb_host -~~	() https://github.com/STMicroelectronics/stm32_mw_usb_host - Product
CPE	cpe:2.3:a:st:stm32_mw_usb_host:-:::::::*	cpe:2.3:a:st:stm32_mw_usb_host::::::::

Information

Published : 2022-10-21 10:15

Updated : 2026-10-08 18:23

NVD link : CVE-2021-42553

Mitre link : CVE-2021-42553

CVE.ORG link : CVE-2021-42553

JSON object : View

Products Affected

st

stm32_mw_usb_host

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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