{"id":"CVE-2021-21778","aliases":["EUVD-2021-8950","GHSA-f72g-c5hf-789v"],"status":"published","title":"A denial of service vulnerability exists in the ASDU message processing functionality of MZ...","description":"A denial of service vulnerability exists in the ASDU message processing functionality of MZ Automation GmbH lib60870.NET 2.2.0. A specially crafted network request can lead to loss of communications. An attacker can send an unauthenticated message to trigger this vulnerability.","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":"2026-11-09","score":0.01261,"percentile":0.69837,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-617"],"published":"2021-08-25T18:27:21Z","modified":"2026-10-24T10:30:59Z","products":[{"vendor":"mz-automation","product":"lib60870"}],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1236","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21778"},{"url":"https://github.com/advisories/GHSA-f72g-c5hf-789v"}],"sources":{"cve":[{"id":"CVE-2021-21778","description":"A denial of service vulnerability exists in the ASDU message processing functionality of MZ Automation GmbH lib60870.NET 2.2.0. A specially crafted network request can lead to loss of communications. An attacker can send an unauthenticated message to trigger this vulnerability.","status":"published","published":"2021-08-25T18:27:21Z","modified":"2024-08-03T18:23:29.38Z","updated_at":"2026-11-02T14:33:00.488332Z"}],"euvd":[{"id":"EUVD-2021-8950","description":"A denial of service vulnerability exists in the ASDU message processing functionality of MZ Automation GmbH lib60870.NET 2.2.0. A specially crafted network request can lead to loss of communications. An attacker can send an unauthenticated message to trigger this vulnerability.","status":"published","published":"2021-08-25T18:27:21Z","modified":"2024-08-03T18:23:29Z","updated_at":"2026-11-03T03:25:05.131984Z"}],"ghsa":[{"id":"GHSA-f72g-c5hf-789v","title":"A denial of service vulnerability exists in the ASDU message processing functionality of MZ...","description":"A denial of service vulnerability exists in the ASDU message processing functionality of MZ Automation GmbH lib60870.NET 2.2.0. A specially crafted network request can lead to loss of communications. An attacker can send an unauthenticated message to trigger this vulnerability.","status":"published","published":"2022-05-24T19:12:11Z","modified":"2023-01-30T05:01:48Z","cwes":["CWE-617"],"updated_at":"2026-11-02T14:46:29.327755Z"}],"nvd":[{"id":"CVE-2021-21778","description":"A denial of service vulnerability exists in the ASDU message processing functionality of MZ Automation GmbH lib60870.NET 2.2.0. A specially crafted network request can lead to loss of communications. An attacker can send an unauthenticated message to trigger this vulnerability.","status":"published","published":"2021-08-25T19:15:08.417Z","modified":"2026-06-17T03:36:06.103Z","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-617"],"updated_at":"2026-11-02T14:06:57.67549Z"}],"osv":[{"id":"CVE-2021-21778","description":"A denial of service vulnerability exists in the ASDU message processing functionality of MZ Automation GmbH lib60870.NET 2.2.0. A specially crafted network request can lead to loss of communications. An attacker can send an unauthenticated message to trigger this vulnerability.","status":"published","published":"2021-08-25T19:15:08.417Z","modified":"2026-10-24T10:30:59.34389462Z","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"}],"updated_at":"2026-11-02T15:44:18.367807Z"}]}}