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Critical · 10.0 CVE-2026-2743 EUVD-2026-9794GHSA-3hq3-ff7h-6mf5

SEPPmail User Web Interface Arbitrary File Write to RCE

Published Mar 5, 2026 · Updated May 19, 2026 · Assigned by NCSC.ch

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

Affected products

VendorProductAffectedFixed
SeppMail SeppMail unknown – ≤ 15.0.2.1 —

References