---
title: "CVE-2026-104082: SmarterMail - Remote Code Execution"
description: "SmarterMail before build 9777 contains a remote code execution caused by bypassing Volume Mount script-directory containment via domain-put endpoint, letting attackers with SysAdmin-scoped tokens execute SYSTEM-level code, exploit requires SysAdmin-scoped access token."
url: https://panop.io/threat-heartbeat/CVE-2026-104082/
---

# CVE-2026-104082 SmarterMail - Remote Code Execution

SmarterMail before build 9777 contains a remote code execution caused by bypassing Volume Mount script-directory containment via domain-put endpoint, letting attackers with SysAdmin-scoped tokens execute SYSTEM-level code, exploit requires SysAdmin-scoped access token.

CVSS base score 7.2 /10

High

CISA KEV

Not listed

Public exploit

Proof of concept available

Authentication

Required

EPSS

0.61% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-104082)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution, Privilege Escalation

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Published

9 October 2026

Updated

15 October 2026

Weakness

[CWE-94](https://cwe.mitre.org/data/definitions/94.html)

## Vendor fix

Update to build 9777 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-104082](https://nvd.nist.gov/vuln/detail/CVE-2026-104082)
- [https://www.smartertools.com/smartermail/release-notes/current#/9526:~:text=Build%209777%20(Oct%208%2C%202026)](https://www.smartertools.com/smartermail/release-notes/current#/9526:~:text=Build%209777%20%28Oct%208%2C%202026%29)
- [https://www.vulncheck.com/advisories/smartermail-build-9777-sysadmin-remote-code-execution-via-volume-mount](https://www.vulncheck.com/advisories/smartermail-build-9777-sysadmin-remote-code-execution-via-volume-mount)
- [https://blog.evan.lat/posts/sm/](https://blog.evan.lat/posts/sm/)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)