CVE-2021-42553
6.8 · MEDIUMOverview
CVE-2021-42553 is a medium-severity vulnerability affecting st stm32_mw_usb_host. It was published on October 21, 2022 and has a CVSS 3.1 base score of 6.8 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from st. Update stm32_mw_usb_host to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
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Frequently Asked Questions
What is CVE-2021-42553?
CVE-2021-42553 is a medium-severity vulnerability affecting st stm32_mw_usb_host. It was published on October 21, 2022 and has a CVSS 3.1 base score of 6.8 (MEDIUM).
How severe is CVE-2021-42553?
This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-42553?
Check the references section for vendor advisories and patches from st. Update stm32_mw_usb_host to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-42553?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-42553 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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