CVE-2021-42553 is a critical buffer overflow vulnerability affecting STMicroelectronics' stm32_mw_usb_host library in versions prior to 3.5.1, commonly integrated into STM32 MCUs with RTOS like FreeRTOS. This flaw allows unauthenticated remote attackers to execute arbitrary code by crafting a descriptor with an excessive number of endpoints. With a CVSS score of 9.8 (CRITICAL), it presents a high risk for complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:st:stm32_mw_usb_host:-:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.