Is CVE-2026-104082 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-104082 being exploited in the wild.

How severe is CVE-2026-104082?

High severity, with a CVSS score of 7.2, published 9 October 2026.

Which products and versions are affected?

SmarterTools SmarterMail before build 9777.

Is there a fix for CVE-2026-104082?

Yes: fixed in SmarterMail build 9777. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-104082 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-104082?

Check whether you run SmarterTools SmarterMail at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-104082: SmarterMail remote code execution with SysAdmin token

CVE-2026-104082 · Severity: high · CVSS 7.2 · Published 2026-10-09

SmarterMail is an enterprise email and groupware server used by thousands of organizations worldwide. An attacker with administrative access to SmarterMail can exploit a series of security gaps to bypass protection controls and upload malicious code that executes with SYSTEM privileges, potentially compromising the entire email server and accessing all stored data.

Technologies: SmarterTools SmarterMail. Vendors: SmarterTools.

Quick answers

Is CVE-2026-104082 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-104082 being exploited in the wild.
How severe is CVE-2026-104082?: High severity, with a CVSS score of 7.2, published 9 October 2026.
Which products and versions are affected?: SmarterTools SmarterMail before build 9777.
Is there a fix for CVE-2026-104082?: Yes: fixed in SmarterMail build 9777. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-104082 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-104082?: Check whether you run SmarterTools SmarterMail at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: SmarterMail build 9777

Technical details

A SysAdmin-scoped access token holder can chain multiple vulnerabilities to achieve RCE: bypassing Volume Mount script containment by creating a domain with an arbitrary FileStore in the Scripts directory, disclosing the Scripts path via AddOrUpdateMount, clearing upload restrictions via the global-mail endpoint, uploading a malicious script, and triggering RunScript execution before validation. The attack results in code execution as the SmarterMail service account with SYSTEM privileges.

Affected products

SmarterTools SmarterMail before build 9777

Timeline

2026-10-09: disclosed
2026-10-08: patched

References

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