{"id":"CVE-2021-25909","aliases":["EUVD-2021-12780","GHSA-72wr-xhp6-g67f"],"status":"published","title":"ZIV AUTOMATION 4CCT Denial of Service vulnerability","description":"ZIV Automation 4CCT-EA6-334126BF firmware version 3.23.80.27.36371, allows an unauthenticated, remote attacker to cause a denial of service condition on the device. An attacker could exploit this vulnerability by sending specific packets to the port 7919.","severity":{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01315,"percentile":0.70951,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2021-01-29T13:24:37Z","modified":"2026-06-17T03:42:33Z","products":[{"vendor":"ziv automation","product":"4cct-ea6-334126bf"},{"vendor":"zivautomation","product":"4cct-ea6-334126bf_firmware"}],"references":[{"url":"https://www.incibe-cert.es/en/early-warning/ics-advisories/4cct-vulnerable-denial-service-attack","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25909"},{"url":"https://github.com/advisories/GHSA-72wr-xhp6-g67f"}],"sources":{"cve":[{"id":"CVE-2021-25909","title":"ZIV AUTOMATION 4CCT Denial of Service vulnerability","description":"ZIV Automation 4CCT-EA6-334126BF firmware version 3.23.80.27.36371, allows an unauthenticated, remote attacker to cause a denial of service condition on the device. An attacker could exploit this vulnerability by sending specific packets to the port 7919.","status":"published","published":"2021-01-29T13:24:37.269Z","modified":"2024-09-16T18:24:13.155Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:32:59.802172Z"}],"euvd":[{"id":"EUVD-2021-12780","description":"ZIV Automation 4CCT-EA6-334126BF firmware version 3.23.80.27.36371, allows an unauthenticated, remote attacker to cause a denial of service condition on the device. An attacker could exploit this vulnerability by sending specific packets to the port 7919.","status":"published","published":"2021-01-29T13:24:37Z","modified":"2024-09-16T18:24:13Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T00:55:32.945265Z"}],"ghsa":[{"id":"GHSA-72wr-xhp6-g67f","title":"ZIV Automation 4CCT-EA6-334126BF firmware version 3.23.80.27.36371, allows an unauthenticated,...","description":"ZIV Automation 4CCT-EA6-334126BF firmware version 3.23.80.27.36371, allows an unauthenticated, remote attacker to cause a denial of service condition on the device. An attacker could exploit this vulnerability by sending specific packets to the port 7919.","status":"published","published":"2022-05-24T17:40:38Z","modified":"2023-01-29T05:05:11Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:45:43.934947Z"}],"nvd":[{"id":"CVE-2021-25909","description":"ZIV Automation 4CCT-EA6-334126BF firmware version 3.23.80.27.36371, allows an unauthenticated, remote attacker to cause a denial of service condition on the device. An attacker could exploit this vulnerability by sending specific packets to the port 7919.","status":"published","published":"2021-01-29T14:15:12.277Z","modified":"2026-06-17T03:42:33.763Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high","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-400"],"updated_at":"2026-11-02T14:06:49.660551Z"}]}}