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Vulnerabilities

Vulnerability · CVE-2026-2743

Arbitrary File Write via Path Traversal upload to Remote Code Execution in SeppMail User Web Interface.

Published Mar 5, 2026 · catalog updated Jun 17, 2026 · Arbitrary File Write via

Check if you run it

No confirmed exploitation is on record for CVE-2026-2743. EPSS is 1.03%. Act only if a listed version of Arbitrary File Write via is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Arbitrary File Write via).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical10.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.03%
Remediation
Not established
Affected products
cpe seppmail/seppmail

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe seppmail/seppmailversion unspecified

How to fix CVE-2026-2743

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-2743. EPSS is 1.03%. Act only if a listed version of Arbitrary File Write via is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-22: Path Traversal; CWE-434: Unrestricted Upload of File with Dangerous Type. EPSS 1.03%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 5, 2026 · NIST NVD

    Detected

    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

  2. Jun 17, 2026 · NIST NVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2026-2743

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-2743

    30-day exploitation probability 1.0%

    first.org
  • NIST NVDVulnerability recordCVE-2026-2743

    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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.