{"id":"CVE-2026-104082","aliases":[],"title":"SmarterMail < Build 9777 SysAdmin Remote Code Execution via Volume Mount","titleSource":"VulnCheck","descriptionSource":"VulnCheck","products":[{"vendor":"Smartertools","name":"Smartermail","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"Build 9777","versionType":"custom"}],"defaultStatus":"unaffected","source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-104082"}],"remediation":[],"description":"SmarterMail before build 9777 contains a remote code execution vulnerability that allows an attacker holding a SysAdmin-scoped access token to bypass the Volume Mount script-directory containment control by provisioning a new mail domain with an arbitrary FileStore root path inside the trusted Scripts directory via the domain-put endpoint. Attackers can disclose the Scripts path through the AddOrUpdateMount endpoint, clear the upload extension blacklist via the global-mail endpoint, then upload a malicious script through the ordinary mail file-storage upload API so that saving a CommandMount triggers RunScript before validation, resulting in a reverse shell executing as the SmarterMail service account with SYSTEM-level privileges.","severity":"high","score":8.6,"published":"2026-10-09T15:05:21.411Z","modified":"2026-10-27T01:30:36.085Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://www.smartertools.com/smartermail/release-notes/current#/9526:~:text=Build%209777%20(Oct%208%2C%202026)","https://blog.evan.lat/posts/sm/","https://www.vulncheck.com/advisories/smartermail-build-9777-sysadmin-remote-code-execution-via-volume-mount"],"sources":[{"name":"CVE","id":"CVE-2026-104082","modified":"2026-10-27T01:30:36.085Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-104082"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.6},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":7.2}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T20:05:31.497Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}