What is CVE-2021-40327?

CVE-2021-40327 is a medium-severity vulnerability in Trustedfirmware Trusted_firmware-m, classified under Missing Authorization. CVSS score: 5.9/10. Published 2022-01-13.

How severe is CVE-2021-40327?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in Trustedfirmware Trusted_firmware-m

CVE-2021-40327

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 asso…

Vulnerability class: Broken Access Control

EPSS: 0.003 (56.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Trustedfirmware Trusted_firmware-m — versions 1.4.0
N/a — versions n/a

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Patch, x_refsource_MISC, Vendor Advisory)
cve@mitre.org (x_refsource_CONFIRM, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-40327?: CVE-2021-40327 is a medium-severity vulnerability in Trustedfirmware Trusted_firmware-m, classified under Missing Authorization. CVSS score: 5.9/10. Published 2022-01-13.
How severe is CVE-2021-40327?: Medium severity. CVSS v3 base score is 5.9 out of 10.