SEPPmail Secure Email Gateway up to 15.1.0 path traversal

Summaryinfo

A vulnerability described as very critical has been identified in SEPPmail Secure Email Gateway up to 15.1.0. This vulnerability affects unknown code. The manipulation results in path traversal. This vulnerability is identified as CVE-2026-114425. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in SEPPmail Secure Email Gateway up to 15.1.0. It has been classified as very critical. Affected is an unknown code block. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

SEPPmail Secure Email Gateway before 15.1.1 trusts a file path supplied in externally provided Large File Transfer attachment metadata. An unauthenticated remote sender can cause the mail-processing worker to disclose, move, or delete an accessible regular file when LFT is enabled and the message reaches an affected secure-mail processing path. The validated workers ran as root.

The advisory is shared for download at docs.seppmail.com. This vulnerability is traded as CVE-2026-114425 since 10/21/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/04/2026). The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 15.1.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-116782). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• SEPPmail

Name

• Secure Email Gateway

Version

• 15.0
• 15.1.0

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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