Medium severity5.9NVD Advisory· Published Jan 13, 2022· Updated Jun 17, 2026
CVE-2021-40327
CVE-2021-40327
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- cpe:2.3:o:trustedfirmware:trusted_firmware-m:1.4.0:*:*:*:*:*:*:*
- Trusted Firmware-M/Trusted Firmware-Mdescription
- Range: =1.4.0
Patches
Vulnerability mechanics
References
2- tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.htmlnvdPatchVendor Advisory
- developer.arm.com/support/arm-security-updatesnvdThird Party Advisory
News mentions
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