{"id":"CVE-2021-28911","aliases":["EUVD-2021-15564","GHSA-45rc-fw3m-7fq5"],"status":"published","title":"BAB TECHNOLOGIE GmbH eibPort V3 prior version 3.9.1 allow unauthenticated attackers access to ...","description":"BAB TECHNOLOGIE GmbH eibPort V3 prior version 3.9.1 allow unauthenticated attackers access to /tmp path which contains some sensitive data (e.g. device serial number). Having those info, a possible loginId can be self-calculated in a brute force attack against BMX interface. This is usable and part of an attack chain to gain SSH root access.","severity":{"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","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01653,"percentile":0.76871,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-307","CWE-863"],"published":"2021-09-09T17:45:39Z","modified":"2026-06-17T03:47:02Z","products":[{"vendor":"bab-technologie","product":"eibport_firmware"}],"references":[{"url":"https://psytester.github.io/CVE-2021-28911","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-28911"},{"url":"https://github.com/advisories/GHSA-45rc-fw3m-7fq5"}],"sources":{"cve":[{"id":"CVE-2021-28911","description":"BAB TECHNOLOGIE GmbH eibPort V3 prior version 3.9.1 allow unauthenticated attackers access to /tmp path which contains some sensitive data (e.g. device serial number). Having those info, a possible loginId can be self-calculated in a brute force attack against BMX interface. This is usable and part of an attack chain to gain SSH root access.","status":"published","published":"2021-09-09T17:45:39Z","modified":"2024-08-03T21:55:12.29Z","updated_at":"2026-11-02T14:33:09.175141Z"}],"euvd":[{"id":"EUVD-2021-15564","description":"BAB TECHNOLOGIE GmbH eibPort V3 prior version 3.9.1 allow unauthenticated attackers access to /tmp path which contains some sensitive data (e.g. device serial number). Having those info, a possible loginId can be self-calculated in a brute force attack against BMX interface. This is usable and part of an attack chain to gain SSH root access.","status":"published","published":"2021-09-09T17:45:39Z","modified":"2024-08-03T21:55:12Z","updated_at":"2026-11-03T03:24:46.117926Z"}],"ghsa":[{"id":"GHSA-45rc-fw3m-7fq5","title":"BAB TECHNOLOGIE GmbH eibPort V3 prior version 3.9.1 allow unauthenticated attackers access to ...","description":"BAB TECHNOLOGIE GmbH eibPort V3 prior version 3.9.1 allow unauthenticated attackers access to /tmp path which contains some sensitive data (e.g. device serial number). Having those info, a possible loginId can be self-calculated in a brute force attack against BMX interface. This is usable and part of an attack chain to gain SSH root access.","status":"published","published":"2022-05-24T19:13:58Z","modified":"2023-01-30T05:02:09Z","cwes":["CWE-307"],"updated_at":"2026-11-02T14:46:34.16886Z"}],"nvd":[{"id":"CVE-2021-28911","description":"BAB TECHNOLOGIE GmbH eibPort V3 prior version 3.9.1 allow unauthenticated attackers access to /tmp path which contains some sensitive data (e.g. device serial number). Having those info, a possible loginId can be self-calculated in a brute force attack against BMX interface. This is usable and part of an attack chain to gain SSH root access.","status":"published","published":"2021-09-09T18:15:08.873Z","modified":"2026-06-17T03:47:02.097Z","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","assessor":"primary"},{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-307","CWE-863"],"updated_at":"2026-11-02T14:06:58.502206Z"}]}}