{"id":"CVE-2026-104082","state":"PUBLISHED","title":"SmarterMail < Build 9777 SysAdmin Remote Code Execution via Volume Mount","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.","publishedAt":"2026-10-09T15:05:21.411Z","updatedAt":"2026-10-27T01:30:36.085Z","severity":{"score":8.6,"label":"High","version":"4.0","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","source":"VulnCheck"},"assigner":"VulnCheck","products":["Smartertools Smartermail"],"affected":[{"vendor":"Smartertools","product":"Smartermail","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"Build 9777","versionType":"custom"}]}],"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"],"weaknesses":["CWE-94"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/104xxx/CVE-2026-104082.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-104082","state":"PUBLISHED","datePublished":"2026-10-09T15:05:21.411Z","dateUpdated":"2026-10-27T01:30:36.085Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-01T18:02:50.084Z"},"containers":{"cna":{"title":"SmarterMail < Build 9777 SysAdmin Remote Code Execution via Volume Mount","descriptions":[{"lang":"en","value":"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. 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