CVE-2021-40327: Trustedfirmware Trusted Firmware-M

Medium severity, CVSS 5.9. EPSS: 1.2% chance of exploitation in the next 30 days.

Trusted Firmware-M (TF-M) 1.4.0, when Profile Small is used, has incorrect access control. NSPE can access a secure key (held by the Crypto service) based solely on knowledge of its key ID. For example, there is no authorization check associated with the relationship between a caller and a key owner.

Affected products

Published 2022-01-13. Last modified 2026-06-17.