{"id":"CVE-2021-28139","aliases":["EUVD-2021-14838","GHSA-jr8m-qx83-r6p3"],"status":"published","title":"The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly...","description":"The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly restrict the Feature Page upon reception of an LMP Feature Response Extended packet, allowing attackers in radio range to trigger arbitrary code execution in ESP32 via a crafted Extended Features bitfield payload.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01401,"percentile":0.72897,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-09-07T06:27:53Z","modified":"2026-10-20T10:54:35Z","products":[{"vendor":"espressif","product":"esp-idf"}],"references":[{"url":"https://github.com/espressif/esp-idf","tags":["x_refsource_MISC","x_transferred","Product","Third Party Advisory","package"]},{"url":"https://github.com/espressif/esp32-bt-lib","tags":["x_refsource_MISC","x_transferred","Product","Third Party Advisory","package"]},{"url":"https://www.espressif.com/en/products/socs/esp32","tags":["x_refsource_MISC","x_transferred","Product","Vendor Advisory","advisory"]},{"url":"https://dl.packetstormsecurity.net/papers/general/braktooth.pdf","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-28139"},{"url":"https://github.com/advisories/GHSA-jr8m-qx83-r6p3"}],"sources":{"cve":[{"id":"CVE-2021-28139","description":"The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly restrict the Feature Page upon reception of an LMP Feature Response Extended packet, allowing attackers in radio range to trigger arbitrary code execution in ESP32 via a crafted Extended Features bitfield payload.","status":"published","published":"2021-09-07T06:27:53Z","modified":"2024-08-03T21:33:17.547Z","updated_at":"2026-11-02T14:33:08.811269Z"}],"euvd":[{"id":"EUVD-2021-14838","description":"The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly restrict the Feature Page upon reception of an LMP Feature Response Extended packet, allowing attackers in radio range to trigger arbitrary code execution in ESP32 via a crafted Extended Features bitfield payload.","status":"published","published":"2021-09-07T06:27:53Z","modified":"2024-08-03T21:33:17Z","updated_at":"2026-11-03T03:24:47.80549Z"}],"ghsa":[{"id":"GHSA-jr8m-qx83-r6p3","title":"The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly...","description":"The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly restrict the Feature Page upon reception of an LMP Feature Response Extended packet, allowing attackers in radio range to trigger arbitrary code execution in ESP32 via a crafted Extended Features bitfield payload.","status":"published","published":"2022-05-24T19:13:16Z","modified":"2023-01-30T05:01:55Z","updated_at":"2026-11-02T14:46:31.204916Z"}],"nvd":[{"id":"CVE-2021-28139","description":"The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly restrict the Feature Page upon reception of an LMP Feature Response Extended packet, allowing attackers in radio range to trigger arbitrary code execution in ESP32 via a crafted Extended Features bitfield payload.","status":"published","published":"2021-09-07T07:15:06.877Z","modified":"2026-06-17T03:45:51.92Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":8.3,"vector":"AV:A/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:06:58.05696Z"}],"osv":[{"id":"CVE-2021-28139","description":"The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly restrict the Feature Page upon reception of an LMP Feature Response Extended packet, allowing attackers in radio range to trigger arbitrary code execution in ESP32 via a crafted Extended Features bitfield payload.","status":"published","published":"2021-09-07T07:15:06.877Z","modified":"2026-10-20T10:54:35.806719283Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:19.129331Z"}]}}