{"id":"CVE-2021-27478","aliases":["EUVD-2021-14232","GHSA-3c24-g4gm-98v9"],"status":"published","title":"EIPStackGroup OpENer Ethernet/IP Incorrect Conversion between Numeric Types","description":"A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may cause a denial-of-service condition.","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01124,"percentile":0.6668,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-681"],"published":"2022-05-12T19:17:22Z","modified":"2026-10-20T10:53:40Z","products":[{"vendor":"eipstackgroup","product":"opener ethernet/ip"},{"vendor":"opener_project","product":"opener"}],"references":[{"url":"https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","US Government Resource","advisory"]},{"url":"https://github.com/EIPStackGroup/OpENer","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27478"},{"url":"https://github.com/advisories/GHSA-3c24-g4gm-98v9"}],"sources":{"cve":[{"id":"CVE-2021-27478","title":"EIPStackGroup OpENer Ethernet/IP Incorrect Conversion between Numeric Types","description":"A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may cause a denial-of-service condition.","status":"published","published":"2022-05-12T19:17:22Z","modified":"2025-04-16T16:22:32.573Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-681"],"updated_at":"2026-11-02T14:33:04.360272Z"}],"euvd":[{"id":"EUVD-2021-14232","description":"A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may cause a denial-of-service condition.","status":"published","published":"2022-05-12T19:17:22Z","modified":"2025-04-16T16:22:32Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"updated_at":"2026-11-02T20:52:24.329168Z"}],"ghsa":[{"id":"GHSA-3c24-g4gm-98v9","title":"A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and...","description":"A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may cause a denial-of-service condition.","status":"published","published":"2022-05-13T00:00:29Z","modified":"2023-02-01T05:02:23Z","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-681"],"updated_at":"2026-11-02T14:49:53.83549Z"}],"nvd":[{"id":"CVE-2021-27478","description":"A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may cause a denial-of-service condition.","status":"published","published":"2022-05-12T20:15:13.693Z","modified":"2026-06-17T03:44:56.803Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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-681"],"updated_at":"2026-11-02T14:07:06.029737Z"}],"osv":[{"id":"CVE-2021-27478","description":"A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may cause a denial-of-service condition.","status":"published","published":"2022-05-12T20:15:13.693Z","modified":"2026-10-20T10:53:40.948617572Z","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":"2026-11-02T15:44:19.129331Z"}]}}