{"id":"CVE-2020-27211","aliases":["EUVD-2020-19730","GHSA-g62r-h4q8-qx29"],"status":"published","title":"Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against...","description":"Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against physical side channels. The flash read-out protection (APPROTECT) can be bypassed by injecting a fault during the boot phase.","severity":{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00296,"percentile":0.22399,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-203","CWE-74"],"published":"2021-05-21T12:04:45Z","modified":"2026-06-17T03:08:56Z","products":[{"vendor":"nordicsemi","product":"nrf52840_firmware"}],"references":[{"url":"https://www.aisec.fraunhofer.de/en/FirmwareProtection.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://eprint.iacr.org/2021/640","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://limitedresults.com/2020/06/nrf52-debug-resurrection-approtect-bypass/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://infocenter.nordicsemi.com/pdf/in_133_v1.0.pdf","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27211"},{"url":"https://github.com/advisories/GHSA-g62r-h4q8-qx29"}],"sources":{"cve":[{"id":"CVE-2020-27211","description":"Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against physical side channels. The flash read-out protection (APPROTECT) can be bypassed by injecting a fault during the boot phase.","status":"published","published":"2021-05-21T12:04:45Z","modified":"2024-08-04T16:11:35.913Z","updated_at":"2026-11-02T14:35:53.552996Z"}],"euvd":[{"id":"EUVD-2020-19730","description":"Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against physical side channels. The flash read-out protection (APPROTECT) can be bypassed by injecting a fault during the boot phase.","status":"published","published":"2021-05-21T12:04:45Z","modified":"2024-08-04T16:11:35Z","updated_at":"2026-11-03T03:07:13.515696Z"}],"ghsa":[{"id":"GHSA-g62r-h4q8-qx29","title":"Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against...","description":"Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against physical side channels. The flash read-out protection (APPROTECT) can be bypassed by injecting a fault during the boot phase.","status":"published","published":"2022-05-24T19:02:57Z","modified":"2023-01-29T05:06:18Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"cwes":["CWE-74","CWE-203"],"updated_at":"2026-11-02T14:45:59.496932Z"}],"nvd":[{"id":"CVE-2020-27211","description":"Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against physical side channels. The flash read-out protection (APPROTECT) can be bypassed by injecting a fault during the boot phase.","status":"published","published":"2021-05-21T13:15:07.627Z","modified":"2026-06-17T03:08:56.64Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.3,"vector":"AV:L/AC:M/Au:N/C:P/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:06:39.25999Z"}]}}