{"id":"CVE-2021-38387","aliases":["EUVD-2021-24839","GHSA-mh86-qhjh-fvr5"],"status":"published","title":"In Contiki 3.0, a Telnet server that silently quits (before disconnection with clients) leads to...","description":"In Contiki 3.0, a Telnet server that silently quits (before disconnection with clients) leads to connected clients entering an infinite loop and waiting forever, which may cause excessive CPU consumption.","severity":{"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","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00961,"percentile":0.61867,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770","CWE-835"],"published":"2021-08-10T18:59:23Z","modified":"2026-06-17T04:02:00Z","products":[{"vendor":"contiki-os","product":"contiki"}],"references":[{"url":"https://github.com/contiki-os/contiki/issues/2688","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-38387"},{"url":"https://github.com/advisories/GHSA-mh86-qhjh-fvr5"}],"sources":{"cve":[{"id":"CVE-2021-38387","description":"In Contiki 3.0, a Telnet server that silently quits (before disconnection with clients) leads to connected clients entering an infinite loop and waiting forever, which may cause excessive CPU consumption.","status":"published","published":"2021-08-10T18:59:23Z","modified":"2024-08-04T01:37:16.521Z","updated_at":"2026-11-02T14:33:07.697752Z"}],"euvd":[{"id":"EUVD-2021-24839","description":"In Contiki 3.0, a Telnet server that silently quits (before disconnection with clients) leads to connected clients entering an infinite loop and waiting forever, which may cause excessive CPU consumption.","status":"published","published":"2021-08-10T18:59:23Z","modified":"2024-08-04T01:37:16Z","updated_at":"2026-11-03T03:24:25.244479Z"}],"ghsa":[{"id":"GHSA-mh86-qhjh-fvr5","title":"In Contiki 3.0, a Telnet server that silently quits (before disconnection with clients) leads to...","description":"In Contiki 3.0, a Telnet server that silently quits (before disconnection with clients) leads to connected clients entering an infinite loop and waiting forever, which may cause excessive CPU consumption.","status":"published","published":"2022-05-24T19:10:31Z","modified":"2023-01-30T05:01:19Z","cvss":[{"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"}],"cwes":["CWE-770","CWE-835"],"updated_at":"2026-11-02T14:46:22.963176Z"}],"nvd":[{"id":"CVE-2021-38387","description":"In Contiki 3.0, a Telnet server that silently quits (before disconnection with clients) leads to connected clients entering an infinite loop and waiting forever, which may cause excessive CPU consumption.","status":"published","published":"2021-08-10T19:15:07.863Z","modified":"2026-06-17T04:02:00.127Z","cvss":[{"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-835"],"updated_at":"2026-11-02T14:06:56.943671Z"}]}}