CVE-2021-40327

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Summary

CVECVE-2021-40327
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-01-13 16:15:07 UTC
Updated2026-06-05 20:36:28 UTC
DescriptionTrusted 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.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

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

EPSS: 0.003300000 probability, percentile 0.563750000 (date 2026-06-11)

Problem Types: CWE-862 | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
2.0[email protected]Primary2.6AV:N/AC:H/Au:N/C:P/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
High
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

AV:N/AC:H/Au:N/C:P/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Trustedfirmware Trusted Firmware-m 1.4.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Advisory TFMV-4 — Trusted Firmware-M v1.5.0+ (f07cc31) documentation af854a3a-2127-422b-91ae-364da2661108 tf-m-user-guide.trustedfirmware.org Patch, Vendor Advisory
trusted-firmware-m.git - Trusted Firmware for M profile Arm CPUs af854a3a-2127-422b-91ae-364da2661108 git.trustedfirmware.org Patch, Vendor Advisory
Arm Security Center af854a3a-2127-422b-91ae-364da2661108 developer.arm.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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