CVE-2026-2743

Name: CVE-2026-2743
Creator: NVD / NIST
Published: 2026-03-05T07:16:14.67+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 10/10EPSS 0.84%

Last modified Jun 17, 2026

CVE-2026-2743 is a critical-severity vulnerability rated 10/10 on the CVSS scale. 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). EPSS estimates a 0.84% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

10/10

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:X

EPSS Probability

0.84%

53.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Seppmail	Seppmail	<= 15.0.2.1

References

Timeline

Published: Mar 5, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2026-2743?

How severe is CVE-2026-2743?

CVE-2026-2743 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 0.84% probability of exploitation in the next 30 days.

How do I fix CVE-2026-2743?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-2743?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST