{"id":"CVE-2021-40327","aliases":["EUVD-2021-27507","GHSA-p88f-g9m7-hv9c","UBUNTU-CVE-2021-40327"],"status":"published","title":"Trusted Firmware-M (TF-M) 1.4.0, when Profile Small is used, has incorrect access control. NSPE...","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.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01234,"percentile":0.69234,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-862"],"published":"2022-01-13T15:31:35Z","modified":"2026-06-17T04:06:44Z","products":[{"vendor":"trustedfirmware","product":"trusted_firmware-m"}],"references":[{"url":"https://developer.arm.com/support/arm-security-updates","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","report"]},{"url":"https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","fix","report"]},{"url":"https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-40327"},{"url":"https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git"},{"url":"https://github.com/advisories/GHSA-p88f-g9m7-hv9c"},{"url":"https://ubuntu.com/security/CVE-2021-40327","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-40327","tags":["report"]}],"sources":{"cve":[{"id":"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.","status":"published","published":"2022-01-13T15:31:35Z","modified":"2024-08-04T02:27:31.913Z","updated_at":"2026-11-02T14:33:01.495293Z"}],"euvd":[{"id":"EUVD-2021-27507","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.","status":"published","published":"2022-01-13T15:31:35Z","modified":"2024-08-04T02:27:31Z","updated_at":"2026-11-03T03:24:20.862157Z"}],"ghsa":[{"id":"GHSA-p88f-g9m7-hv9c","title":"Trusted Firmware-M (TF-M) 1.4.0, when Profile Small is used, has incorrect access control. NSPE...","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.","status":"published","published":"2022-01-14T00:02:18Z","modified":"2026-06-05T21:32:55Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T15:08:36.196175Z"}],"nvd":[{"id":"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.","status":"published","published":"2022-01-13T16:15:07.993Z","modified":"2026-06-17T04:06:44.053Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:07:03.418194Z"}],"osv":[{"id":"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.","status":"published","published":"2022-01-13T16:15:07.993Z","modified":"2026-03-14T11:08:23.579909Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:21.249056Z"},{"id":"UBUNTU-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.","status":"withdrawn","published":"2022-01-13T16:15:00Z","modified":"2026-04-08T13:39:10.819606Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:28.526929Z"}]}}