# CVE-2026-120734: Devolutions Server cleartext transmission of SMTP password in email configuration test

Source: https://junglewise.ai/threats/cve-2026-120734-cleartext-transmission-of-sensitive-information-in-the-email  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-03. Updated: 2026-11-03  
License: CC BY 4.0 with a link back

CVE-2026-120734 · Severity: info · Published 2026-11-03

Devolutions Server is an on-premises platform for managing remote connections and IT operations. An authenticated user with access to the email configuration test feature can intercept the SMTP password in cleartext by directing a test message to an attacker-controlled mail server, exposing email authentication credentials.

Technologies: [Devolutions Server](https://junglewise.ai/threats/technologies/devolutions-server). Vendors: [Devolutions](https://junglewise.ai/threats/vendors/devolutions).

## Quick answers

**Is CVE-2026-120734 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-120734 being exploited in the wild.

**How severe is CVE-2026-120734?** Informational severity, published 3 November 2026.

**Which products and versions are affected?** Devolutions Server 2026.3.13.0 and earlier.

**Is there a fix for CVE-2026-120734?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-120734 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-120734?** Check whether you run Devolutions Server 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.

## Technical details

The email configuration test in Devolutions Server transmits the SMTP password in cleartext to the server specified by the user, without encryption or validation. An authenticated attacker can exploit this by providing an attacker-controlled SMTP host address, allowing interception of the password. This requires authentication and intentional use of the test feature with a malicious SMTP endpoint.

## Affected products

- Devolutions Server 2026.3.13.0 and earlier

## Timeline

- 2026-11-03: disclosed

## References

- [https://devolutions.net/security/advisories/DEVO-2026-0039/](https://devolutions.net/security/advisories/DEVO-2026-0039/)

## Related threats

- [Devolutions Server improper access control in autofill vault search](https://junglewise.ai/threats/cve-2026-126332-improper-access-control-in-the-autofill-vault-search-in)
- [Devolutions Server sensitive information disclosure in user list endpoint](https://junglewise.ai/threats/cve-2026-126331-insertion-of-sensitive-information-into-sent-data-in-the-user)
- [Devolutions Server sensitive information disclosure in user endpoints](https://junglewise.ai/threats/cve-2026-126328-insertion-of-sensitive-information-into-sent-data-in-the-user)
- [Devolutions Server improper access control in connection history](https://junglewise.ai/threats/cve-2026-126327-improper-access-control-in-the-connection-history-in-devolutions)
- [Devolutions Server privilege escalation via role assignment endpoint](https://junglewise.ai/threats/cve-2026-126326-improper-access-control-in-the-administrative-role-assignment)