CVE-2021-40327
5.9 · MEDIUMOverview
CVE-2021-40327 is a medium-severity vulnerability affecting trustedfirmware trusted_firmware-m. It was published on January 13, 2022 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from trustedfirmware. Update trusted_firmware-m to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
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References
Frequently Asked Questions
What is CVE-2021-40327?
CVE-2021-40327 is a medium-severity vulnerability affecting trustedfirmware trusted_firmware-m. It was published on January 13, 2022 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
How severe is CVE-2021-40327?
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-40327?
Check the references section for vendor advisories and patches from trustedfirmware. Update trusted_firmware-m to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-40327?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-40327 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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