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CVE-2026-2743

CRITICAL CVSS 4.0: 10.0 EPSS 0.57%
Updated Mar 05, 2026
Arbitrary
Parameter Value
CVSS 10.0 (CRITICAL)
Type CWE-434 (Unrestricted File Upload), CWE-22 (Path Traversal)
Vendor Arbitrary
Public PoC No

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

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0