CVE-2021-32020

9.8 criticalEPSS 1.3%

Critical (9.8) in amazon freertos. EPSS 1.3% chance of exploitation in the next 30 days.

The kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking during management of heap memory.

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.3% chance of exploitation in the next 30 days; higher than 70% of CVEs (scores of 2026-10-31)
CWE: CWE-119
Published: 2021-05-03
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19