{"id":"CVE-2020-10070","aliases":["EUVD-2020-2535","GHSA-wj3q-4vgj-mfw8"],"status":"published","title":"MQTT buffer overflow on receive buffer","description":"In the Zephyr Project MQTT code, improper bounds checking can result in memory corruption and possibly remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.","severity":{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.02879,"percentile":0.86943,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120","CWE-190"],"published":"2020-06-05T17:37:37Z","modified":"2026-06-17T02:47:17Z","products":[{"vendor":"zephyrproject","product":"zephyr"},{"vendor":"zephyrproject-rtos","product":"zephyr"}],"references":[{"url":"https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-85","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10070","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://github.com/zephyrproject-rtos/zephyr/pull/23821/commits/0b39cbf3c01d7feec9d0dd7cc7e0e374b6113542","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-10070"},{"url":"https://github.com/advisories/GHSA-wj3q-4vgj-mfw8"}],"sources":{"cve":[{"id":"CVE-2020-10070","title":"MQTT buffer overflow on receive buffer","description":"In the Zephyr Project MQTT code, improper bounds checking can result in memory corruption and possibly remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.","status":"published","published":"2020-06-05T17:37:37.459Z","modified":"2024-09-16T23:06:22.833Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-120","CWE-190"],"updated_at":"2026-11-02T14:35:48.213211Z"}],"euvd":[{"id":"EUVD-2020-2535","description":"In the Zephyr Project MQTT code, improper bounds checking can result in memory corruption and possibly remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.","status":"published","published":"2020-06-05T17:37:37Z","modified":"2024-09-16T23:06:22Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:54:56.752396Z"}],"ghsa":[{"id":"GHSA-wj3q-4vgj-mfw8","title":"In the Zephyr Project MQTT code, improper bounds checking can result in memory corruption and...","description":"In the Zephyr Project MQTT code, improper bounds checking can result in memory corruption and possibly remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.","status":"published","published":"2022-05-24T17:19:25Z","modified":"2023-01-29T05:02:50Z","updated_at":"2026-11-02T14:45:10.945052Z"}],"nvd":[{"id":"CVE-2020-10070","description":"In the Zephyr Project MQTT code, improper bounds checking can result in memory corruption and possibly remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.","status":"published","published":"2020-06-05T18:15:12.997Z","modified":"2026-06-17T02:47:17.82Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-120","CWE-190"],"updated_at":"2026-11-02T14:06:05.962132Z"}]}}