{"id":"CVE-2021-28503","aliases":["EUVD-2021-15179","GHSA-mvw4-rrm9-fqfc"],"status":"published","title":"In Arista's EOS software affected releases, eAPI might skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.","description":"The impact of this vulnerability is that Arista's EOS eAPI may skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00735,"percentile":0.54708,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-305"],"published":"2022-02-04T22:29:27Z","modified":"2026-06-17T03:46:28Z","products":[{"vendor":"arista","product":"arista eos"},{"vendor":"arista","product":"eos"},{"vendor":"arista networks","product":"arista eos"}],"references":[{"url":"https://www.arista.com/en/support/advisories-notices/security-advisories/13605-security-advisory-0072","tags":["x_refsource_MISC","x_transferred","Mitigation","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-28503"},{"url":"https://github.com/advisories/GHSA-mvw4-rrm9-fqfc"}],"sources":{"cve":[{"id":"CVE-2021-28503","title":"In Arista's EOS software affected releases, eAPI might skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.","description":"The impact of this vulnerability is that Arista's EOS eAPI may skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.","status":"published","published":"2022-02-04T22:29:27.998Z","modified":"2024-09-16T23:06:02.607Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-305"],"updated_at":"2026-11-02T14:33:08.811269Z"}],"euvd":[{"id":"EUVD-2021-15179","description":"The impact of this vulnerability is that Arista's EOS eAPI may skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.","status":"published","published":"2022-02-04T22:29:27Z","modified":"2024-09-16T23:06:02Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:54:56.752396Z"}],"ghsa":[{"id":"GHSA-mvw4-rrm9-fqfc","title":"The impact of this vulnerability is that Arista's EOS eAPI may skip re-evaluating user...","description":"The impact of this vulnerability is that Arista's EOS eAPI may skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.","status":"published","published":"2022-02-10T00:00:43Z","modified":"2023-01-27T05:03:07Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:42:10.172069Z"}],"nvd":[{"id":"CVE-2021-28503","description":"The impact of this vulnerability is that Arista's EOS eAPI may skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.","status":"published","published":"2022-02-04T23:15:11.35Z","modified":"2026-06-17T03:46:28.667Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-305","CWE-287"],"updated_at":"2026-11-02T14:07:04.178977Z"}]}}