Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-104082

CVE-2026-104082HIGH

Smartertools Smartermail — SmarterMail < Build 9777 SysAdmin Remote Code Execution via Volume Mount

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   H   N   H   H   H    8.6   .0061   48.1     —

AFFECTED
  Product      Versions     Fixed
  Smartermail  unspecified  —

TIMELINE
  Oct 1   Reserved by VulnCheck
  Oct 9   Published (CNA: VulnCheck)
  Oct 12  EXPLOIT PUBLISHED — CVE-2026-104082 (Smartertools Smartermail). Public exploit reference added.
  Oct 14  EXPLOIT PUBLISHED — CVE-2026-104082 (Smartertools Smartermail). Public exploit reference added.

CWE-94 · CNA: VulnCheck · CVSS v4.0 · 3 references · NVD status: Awaiting Analysis

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
October 1, 2026	Reserved	Reserved by VulnCheck
October 9, 2026	Published	Published (CNA: VulnCheck)
October 12, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-104082 (Smartertools Smartermail). Public exploit reference added.
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-104082 (Smartertools Smartermail). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Smartertools	Smartermail	—	—	—

Weaknesses

CWE-94

References (3)

Authoritative record: CVE-2026-104082 at cve.org

Vendors: smartertools

Weaknesses: CWE-94

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-104082 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.