{"id":"CVE-2021-40387","aliases":["EUVD-2021-27564","GHSA-fw24-832r-x4vh"],"status":"published","title":"An issue was discovered in the server software in Kaseya Unitrends Backup Software before 10.5.5...","description":"An issue was discovered in the server software in Kaseya Unitrends Backup Software before 10.5.5-2. There is authenticated remote code execution.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.02427,"percentile":0.8436,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-09-01T20:55:15Z","modified":"2026-06-17T04:06:50Z","products":[{"vendor":"kaseya","product":"unitrends_backup_software"}],"references":[{"url":"https://csirt.divd.nl/csirt-divd-nl/cases/DIVD-2021-00014/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-40387"},{"url":"https://github.com/advisories/GHSA-fw24-832r-x4vh"}],"sources":{"cve":[{"id":"CVE-2021-40387","description":"An issue was discovered in the server software in Kaseya Unitrends Backup Software before 10.5.5-2. There is authenticated remote code execution.","status":"published","published":"2021-09-01T20:55:15Z","modified":"2024-08-04T02:44:09.595Z","updated_at":"2026-11-02T14:33:01.495293Z"}],"euvd":[{"id":"EUVD-2021-27564","description":"An issue was discovered in the server software in Kaseya Unitrends Backup Software before 10.5.5-2. There is authenticated remote code execution.","status":"published","published":"2021-09-01T20:55:15Z","modified":"2024-08-04T02:44:09Z","updated_at":"2026-11-03T03:24:20.862157Z"}],"ghsa":[{"id":"GHSA-fw24-832r-x4vh","title":"An issue was discovered in the server software in Kaseya Unitrends Backup Software before 10.5.5...","description":"An issue was discovered in the server software in Kaseya Unitrends Backup Software before 10.5.5-2. There is authenticated remote code execution.","status":"published","published":"2022-05-24T19:12:40Z","modified":"2023-01-30T05:01:51Z","updated_at":"2026-11-02T14:46:30.304291Z"}],"nvd":[{"id":"CVE-2021-40387","description":"An issue was discovered in the server software in Kaseya Unitrends Backup Software before 10.5.5-2. There is authenticated remote code execution.","status":"published","published":"2021-09-01T21:15:07.393Z","modified":"2026-06-17T04:06:50.59Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:06:58.05696Z"}]}}