# CVE-2026-114425: SEPPmail Secure Email Gateway arbitrary file access via LFT metadata

Source: https://junglewise.ai/threats/cve-2026-114425-seppmail-secure-email-gateway-before-15-1-1-trusts-a-file-path  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-04. Updated: 2026-11-04  
License: CC BY 4.0 with a link back

CVE-2026-114425 · Severity: info · Published 2026-11-04

SEPPmail Secure Email Gateway is an appliance that processes and secures email for organizations. An unauthenticated attacker can craft specially formatted email attachments to cause the system to read, move, or delete arbitrary files on the appliance, including sensitive data, when the Large File Transfer feature is enabled. Since the mail-processing worker runs as root, this could result in complete system compromise.

Technologies: [Seppmail Secure Email Gateway](https://junglewise.ai/threats/technologies/seppmail-secure-email-gateway). Vendors: [Seppmail](https://junglewise.ai/threats/vendors/seppmail).

## Quick answers

**Is CVE-2026-114425 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-114425 being exploited in the wild.

**How severe is CVE-2026-114425?** Informational severity, published 4 November 2026.

**Which products and versions are affected?** Seppmail Secure Email Gateway before 15.1.1.

**Is there a fix for CVE-2026-114425?** Yes: fixed in 15.1.1. Until then: Disable the Large File Transfer feature until the system can be updated to version 15.1.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-114425 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-114425?** Check whether you run Seppmail Secure Email Gateway 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 15.1.1

Disable the Large File Transfer feature until the system can be updated to version 15.1.1 or later.

## Technical details

The vulnerability exists in the Large File Transfer (LFT) attachment processing module, which trusts file paths supplied in externally provided attachment metadata without proper validation. An unauthenticated remote sender can send a specially crafted message with malicious LFT metadata to trigger arbitrary file access operations (read, move, delete) on any accessible file. The mail-processing worker runs with root privileges, amplifying the impact to any file on the system.

## Affected products

- SEPPmail Secure Email Gateway before 15.1.1

## Timeline

- 2026-11-04: advisory
- 2026-10-27: patched

## References

- [https://docs.seppmail.com/en/20_revision-history.html](https://docs.seppmail.com/en/20_revision-history.html)

## Related threats

- [SEPPmail Secure Email Gateway file-interface DoS before authentication](https://junglewise.ai/threats/cve-2026-114426-seppmail-secure-email-gateway-before-15-1-1-processes-and-writes)
- [SEPPmail Secure Email Gateway code injection in address replacement rules](https://junglewise.ai/threats/cve-2026-114424-seppmail-secure-email-gateway-before-15-1-1-can-evaluate)
- [SEPPmail Secure Email Gateway password recovery bypass in GINA](https://junglewise.ai/threats/cve-2026-114421-seppmail-secure-email-gateway-before-15-1-1-permits-password)
- [SEPPmail Secure Email Gateway LDAP injection in account selection](https://junglewise.ai/threats/cve-2026-114420-seppmail-secure-email-gateway-before-15-1-1-does-not-neutralize)
- [SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge…](https://junglewise.ai/threats/cve-2026-29144-seppmail-secure-email-gateway-before-version-15-0-3-allows-an)