{"id":"CVE-2021-43041","aliases":["EUVD-2021-29995","GHSA-ph8m-x93x-px88"],"status":"published","title":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. A crafted HTTP...","description":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. A crafted HTTP request could induce a format string vulnerability in the privileged vaultServer application.","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":0.02362,"percentile":0.83921,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-134"],"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-2021-43041"},{"url":"https://github.com/advisories/GHSA-ph8m-x93x-px88"}],"sources":{"cve":[{"id":"CVE-2021-43041","description":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. A crafted HTTP request could induce a format string vulnerability in the privileged vaultServer application.","status":"published","published":"2021-12-06T00:00:00Z","modified":"2024-08-04T03:47:13.237Z","updated_at":"2026-11-02T14:32:57.033395Z"}],"euvd":[{"id":"EUVD-2021-29995","description":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. A crafted HTTP request could induce a format string vulnerability in the privileged vaultServer application.","status":"published","published":"2021-12-06T00:00:00Z","modified":"2024-08-04T03:47:13Z","updated_at":"2026-11-03T03:24:14.796505Z"}],"ghsa":[{"id":"GHSA-ph8m-x93x-px88","title":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. A crafted HTTP...","description":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. A crafted HTTP request could induce a format string vulnerability in the privileged vaultServer application.","status":"published","published":"2021-12-07T00:00:44Z","modified":"2023-02-03T05:01:56Z","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"}],"cwes":["CWE-134"],"updated_at":"2026-11-02T14:53:04.437142Z"}],"nvd":[{"id":"CVE-2021-43041","description":"An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. A crafted HTTP request could induce a format string vulnerability in the privileged vaultServer application.","status":"published","published":"2021-12-06T04:15:07.51Z","modified":"2026-06-17T04:10:25.247Z","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":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-134"],"updated_at":"2026-11-02T14:07:01.811115Z"}]}}