CVE-2021-40327
MEDIUM
5.9
CVSS Score
Published: January 13, 2022 at 03:31 PM UTC
Updated: June 17, 2026 at 04:06 AM UTC
1 product affected across 1 vendorTrusted Firmware M
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Severity
MEDIUM5.9
Exploit prediction
EPSS 1%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://developer.arm.com/support/arm-security-updatesx_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.htmlCVSS
- Attack Vector
- NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-862
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