{"id":"CVE-2021-21778","details":"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.","modified":"2026-03-14T10:43:54.527029Z","published":"2021-08-25T19:15:08.417Z","references":[{"type":"EVIDENCE","url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1236"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mz-automation/lib60870","events":[{"introduced":"0"},{"last_affected":"4414e78a730405397097612fef11776d8e678950"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"2.2.0"}]}}],"versions":["v0.9.4","v2.0.0","v2.0.1","v2.1.0","v2.1.1","v2.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21778.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}