{"id":"CVE-2020-12140","aliases":["EUVD-2020-4455","GHSA-rhh2-2xqm-4xj9"],"status":"published","title":"A buffer overflow in os/net/mac/ble/ble-l2cap.c in the BLE stack in Contiki-NG 4.4 and earlier...","description":"A buffer overflow in os/net/mac/ble/ble-l2cap.c in the BLE stack in Contiki-NG 4.4 and earlier allows an attacker to execute arbitrary code via malicious L2CAP frames.","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":"2026-11-10","score":0.0095,"percentile":0.61558,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2021-12-07T18:23:51Z","modified":"2026-06-17T02:51:28Z","products":[{"vendor":"contiki-ng","product":"contiki-ng"}],"references":[{"url":"https://twitter.com/ScepticCtf","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/contiki-ng/contiki-ng/pull/1662","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-12140"},{"url":"https://github.com/advisories/GHSA-rhh2-2xqm-4xj9"}],"sources":{"cve":[{"id":"CVE-2020-12140","description":"A buffer overflow in os/net/mac/ble/ble-l2cap.c in the BLE stack in Contiki-NG 4.4 and earlier allows an attacker to execute arbitrary code via malicious L2CAP frames.","status":"published","published":"2021-12-07T18:23:51Z","modified":"2024-08-04T11:48:58.411Z","updated_at":"2026-11-02T14:35:53.236501Z"}],"euvd":[{"id":"EUVD-2020-4455","description":"A buffer overflow in os/net/mac/ble/ble-l2cap.c in the BLE stack in Contiki-NG 4.4 and earlier allows an attacker to execute arbitrary code via malicious L2CAP frames.","status":"published","published":"2021-12-07T18:23:51Z","modified":"2024-08-04T11:48:58Z","updated_at":"2026-11-03T03:07:40.81889Z"}],"ghsa":[{"id":"GHSA-rhh2-2xqm-4xj9","title":"A buffer overflow in os/net/mac/ble/ble-l2cap.c in the BLE stack in Contiki-NG 4.4 and earlier...","description":"A buffer overflow in os/net/mac/ble/ble-l2cap.c in the BLE stack in Contiki-NG 4.4 and earlier allows an attacker to execute arbitrary code via malicious L2CAP frames.","status":"published","published":"2021-12-08T00:01:03Z","modified":"2023-02-01T05:06:43Z","cwes":["CWE-120"],"updated_at":"2026-11-02T14:50:24.546925Z"}],"nvd":[{"id":"CVE-2020-12140","description":"A buffer overflow in os/net/mac/ble/ble-l2cap.c in the BLE stack in Contiki-NG 4.4 and earlier allows an attacker to execute arbitrary code via malicious L2CAP frames.","status":"published","published":"2021-12-07T19:15:07.37Z","modified":"2026-06-17T02:51:28.477Z","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"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:06:46.101987Z"}]}}