{"id":"CVE-2021-27734","aliases":["EUVD-2021-14476","GHSA-r6q8-h627-r6p2"],"status":"published","title":"Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01...","description":"Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the credentials of existing users.","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":0.01264,"percentile":0.70073,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-522"],"published":"2021-05-17T14:28:42Z","modified":"2026-06-17T03:45:23Z","products":[{"vendor":"belden","product":"hirschmann_hios"},{"vendor":"belden","product":"hisecos"}],"references":[{"url":"https://dam.belden.com/dmm3bwsv3/assetstream.aspx?assetid=12914\u0026mediaformatid=50063\u0026destinationid=10016","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27734"},{"url":"https://github.com/advisories/GHSA-r6q8-h627-r6p2"}],"sources":{"cve":[{"id":"CVE-2021-27734","description":"Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the credentials of existing users.","status":"published","published":"2021-05-17T14:28:42Z","modified":"2024-08-03T21:26:10.695Z","updated_at":"2026-11-02T14:33:04.360272Z"}],"euvd":[{"id":"EUVD-2021-14476","description":"Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the credentials of existing users.","status":"published","published":"2021-05-17T14:28:42Z","modified":"2024-08-03T21:26:10Z","updated_at":"2026-11-03T03:24:48.366655Z"}],"ghsa":[{"id":"GHSA-r6q8-h627-r6p2","title":"Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01...","description":"Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the credentials of existing users.","status":"published","published":"2022-05-24T19:02:37Z","modified":"2023-01-27T05:02:56Z","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-522"],"updated_at":"2026-11-02T14:42:08.04985Z"}],"nvd":[{"id":"CVE-2021-27734","description":"Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the credentials of existing users.","status":"published","published":"2021-05-17T15:15:07.7Z","modified":"2026-06-17T03:45:23.203Z","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":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:06:53.343329Z"}]}}