Out-of-bounds Write in the USB Mass Storage memoryWrite handler with unaligned Sizes See NCC-ZEP-024, NCC-ZEP-025, NCC-ZEP-026 This issue affects: zephyrproject-rtos zephyr version 1.14.1 and later versions. version 2.1.0 and later versions.
https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-26
https://github.com/zephyrproject-rtos/zephyr/pull/23456
https://github.com/zephyrproject-rtos/zephyr/pull/23455
https://github.com/zephyrproject-rtos/zephyr/pull/23240
https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10021
Source: Mitre, NVD
Published: 2020-05-11
Updated: 2026-06-17
Base Score: 4.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 7.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity: High
EPSS: 0.00077