CVE-2026-2743

CRITICAL
2026-03-05 [email protected]
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:06 vuln.today
CVE Published
Mar 05, 2026 - 07:16 nvd
CRITICAL 9.8

Tags

RCE Path Traversal Seppmail

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

Analysis

Path traversal to RCE in SeppMail web interface via large file transfer. EPSS 0.52%.

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Remediation

Within 24 hours: Disable the Large File Transfer (LFT) feature in SeppMail if operationally feasible, or restrict access to trusted internal networks only. Within 7 days: Implement Web Application Firewall (WAF) rules to block path traversal patterns in upload requests and segment SeppMail systems from critical infrastructure. …

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Priority Score

50
Low Medium High Critical
KEV: 0
EPSS: +0.5
CVSS: +49
POC: 0

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CVE-2026-2743 vulnerability details – vuln.today
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