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CVE-2026-2743

Seppmail remote code execution

9.8 CRITICALEPSS 1.03%
  1. Published5 Mar 2026

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

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Seppmail≤ 15.0.2.1

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2026-2743 being actively exploited?

CVE-2026-2743 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.03%.

How severe is CVE-2026-2743?

CVE-2026-2743 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.03% probability of exploitation.

Which products are affected by CVE-2026-2743?

Affected products include Seppmail.

How do I fix CVE-2026-2743?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-2743 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.