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CVE-2026-104082

7.2, high

Smartertools Smartermail Code Injection Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.2, high high CVSS v3.1
EPSS, next 30 days
0.6% higher than 48% of scored CVEs
Exploitation
No public evidence
Published
9 Oct 20268 days ago

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.

Details

Vendor
Smartertools
Product
Smartermail
Weakness
CWE-94 (opens in a new tab)
Status
Awaiting analysis
Updated
9 Oct 2026
Assigner
disclosure@vulncheck.com

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

References 2

Other references 2

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Smartertools CVEs

Every Smartertools CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-24423 SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability KEV EPSS 88% 9.8, critical
  • CVE-2026-23760 SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability KEV EPSS 97% 9.8, critical
  • CVE-2025-52691 SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability KEV EPSS 86% 10, critical

Beyond this page

Is CVE-2026-104082 in your network?

This page tells you how dangerous CVE-2026-104082 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-104082 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.