CVE-2026-2743
Modified Modified - Updated After Analysis
Path Traversal Arbitrary File Write in SeppMail LFT Leads to RCE

Publication date: 2026-03-05

Last updated on: 2026-05-19

Assigner: Switzerland Government Common Vulnerability Program

Description
Arbitrary File Write via Path Traversal upload to Remote Code Execution in SeppMail User Web Interface. The affected feature is the large file transfer (LFT). This issue affects SeppMail: 15.0.2.1 and before
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Meta Information
Published
2026-03-05
Last Modified
2026-05-19
Generated
2026-06-16
AI Q&A
2026-03-05
EPSS Evaluated
2026-06-15
NVD
CVE-2026-2743
EUVD
EUVD-2026-9794
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
seppmail seppmail to 15.0.2.1 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
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Impact Analysis

The vulnerability can have severe impacts including unauthorized remote code execution on the affected system. This means attackers can potentially take full control of the system, manipulate files, execute arbitrary commands, and compromise the confidentiality, integrity, and availability of the system and its data.

Compliance Impact

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Detection Guidance

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Executive Summary

This vulnerability in SeppMail versions 15.0.2.1 and earlier allows an attacker to perform an arbitrary file write through a path traversal attack during the large file transfer (LFT) feature in the User Web Interface. This can lead to remote code execution, meaning an attacker can run malicious code on the affected system.

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