{"id":"CVE-2026-123621","title":"Usermin through 2.570 Path Traversal File Write via detachall.cgi","summary":"Usermin through 2.570 contains a path traversal vulnerability in mailbox/detachall.cgi that allows remote unauthenticated attackers to write files outside the temporary directory via unsanitized attachment filenames. Attackers can email …","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-22"],"vendor":"webmin","product":"usermin","affected":["usermin <= 2.570"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-11-06T17:24:19.100245Z"},"exploitAvailable":true,"published":"2026-11-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T17:26:03.502Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123621","references":[{"url":"https://github.com/webmin/usermin/issues/142","label":"GitHub Issue #142"},{"url":"https://github.com/webmin/usermin"},{"url":"https://github.com/webmin/usermin/commit/cb4614e8319e0932b10533a4d5606debf5f40e14","label":"Fix commit cb4614e"},{"url":"https://github.com/webmin/usermin/blob/2.570/mailbox/detachall.cgi#L43-L51","label":"detachall.cgi attachment write"},{"url":"https://hackmd.io/@leediay/H144QKY6zl","label":"Researcher write-up"},{"url":"https://www.vulncheck.com/advisories/usermin-through-2.570-path-traversal-file-write-via-detachall-cgi","label":"VulnCheck Advisory: Usermin through 2.570 Path Traversal File Write via detachall.cgi"}],"tags":["cve.org","exploit-available"],"ingestedAt":"2026-11-06T15:54:04.079Z","epss":0.00984,"epssPercentile":0.62549,"slug":"CVE-2026-123621","body":"## Overview\n\nUsermin through 2.570 contains a path traversal vulnerability in mailbox/detachall.cgi that allows remote unauthenticated attackers to write files outside the temporary directory via unsanitized attachment filenames. Attackers can email attachments with ../ sequences in filenames, and when the recipient downloads all attachments, files like ~/.forward are overwritten, enabling command execution.\n\n## Affected\n\n- `usermin <= 2.570`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":61,"depthScoreParts":{"impact":48.4,"likelihood":0.2,"exploitation":12,"ransomware":0},"changes":[{"seq":235505,"id":"CVE-2026-123621","ts":1793988056221,"field":"exploit_available","old":"false","new":"true"}]}