{"id":"CVE-2020-10063","aliases":["EUVD-2020-2528","GHSA-x97p-2r85-4gq4"],"status":"published","title":"Remote Denial of Service in CoAP Option Parsing Due To Integer Overflow","description":"A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.","severity":{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01803,"percentile":0.78691,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190"],"published":"2020-06-05T17:37:37Z","modified":"2026-06-17T02:47:16Z","products":[{"vendor":"zephyrproject","product":"zephyr"},{"vendor":"zephyrproject-rtos","product":"zephyr"}],"references":[{"url":"https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-55","tags":["x_refsource_MISC","x_transferred","Permissions Required"]},{"url":"https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10063","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://github.com/zephyrproject-rtos/zephyr/pull/24435","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"https://github.com/zephyrproject-rtos/zephyr/pull/24531","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"https://github.com/zephyrproject-rtos/zephyr/pull/24535","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"https://github.com/zephyrproject-rtos/zephyr/pull/24530","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-10063"},{"url":"https://github.com/advisories/GHSA-x97p-2r85-4gq4"}],"sources":{"cve":[{"id":"CVE-2020-10063","title":"Remote Denial of Service in CoAP Option Parsing Due To Integer Overflow","description":"A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.","status":"published","published":"2020-06-05T17:37:37.314Z","modified":"2024-09-17T04:03:51.04Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:35:48.213211Z"}],"euvd":[{"id":"EUVD-2020-2528","description":"A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.","status":"published","published":"2020-06-05T17:37:37Z","modified":"2024-09-17T04:03:51Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:28:26.623918Z"}],"ghsa":[{"id":"GHSA-x97p-2r85-4gq4","title":"A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able...","description":"A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.","status":"published","published":"2022-05-24T17:19:24Z","modified":"2023-01-29T05:02:42Z","updated_at":"2026-11-02T14:45:09.006349Z"}],"nvd":[{"id":"CVE-2020-10063","description":"A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.","status":"published","published":"2020-06-05T18:15:12.667Z","modified":"2026-06-17T02:47:16.97Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:06:05.962132Z"}]}}