CVE-2026-2743 CRITICAL

CVE-2026-2743: SEPPmail User Web Interface Arbitrary File Write to RCE

Vendor Seppmail
Product SeppMail
Weakness CWE-22 · Path traversal
Published March 5, 2026
Last update May 19, 2026
View on NVD All CVEs

CVSS base score

10.0/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

March 5, 2026 CVE published
May 19, 2026 Record updated