{"id":"CVE-2021-43039","aliases":["EUVD-2021-29993","GHSA-mw9g-699g-m8gm"],"status":"published","title":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The Samba file...","description":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The Samba file sharing service allowed anonymous read/write access.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01256,"percentile":0.69911,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-668"],"published":"2021-12-06T00:00:00Z","modified":"2026-06-17T04:10:25Z","products":[{"vendor":"kaseya","product":"unitrends_backup"}],"references":[{"url":"https://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961","tags":["x_transferred","Vendor Advisory"]},{"url":"https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-1","tags":["x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-2","tags":["x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43039"},{"url":"https://github.com/advisories/GHSA-mw9g-699g-m8gm"}],"sources":{"cve":[{"id":"CVE-2021-43039","description":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The Samba file sharing service allowed anonymous read/write access.","status":"published","published":"2021-12-06T00:00:00Z","modified":"2024-08-04T03:47:13.237Z","updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-29993","description":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The Samba file sharing service allowed anonymous read/write access.","status":"published","published":"2021-12-06T00:00:00Z","modified":"2024-08-04T03:47:13Z","updated_at":"2026-11-03T03:24:15.299027Z"}],"ghsa":[{"id":"GHSA-mw9g-699g-m8gm","title":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The Samba file...","description":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The Samba file sharing service allowed anonymous read/write access.","status":"published","published":"2021-12-07T00:00:45Z","modified":"2023-02-03T05:01:50Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:53:02.755418Z"}],"nvd":[{"id":"CVE-2021-43039","description":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The Samba file sharing service allowed anonymous read/write access.","status":"published","published":"2021-12-06T04:15:07.397Z","modified":"2026-06-17T04:10:25.013Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:01.811115Z"}]}}