CVE•Published 2026-03-05•Modified 2026-05-19•1 article on news•7 live references•NVD data

CVE-2026-2743Seppmail · Seppmail

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

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

EPSS percentile

Exploit Prediction Scoring System · top 31% of all CVEs

Weaknesses (CWE)

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')CWE-434Unrestricted Upload of File with Dangerous Type

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

Timeline

Published 2026-03-05

Modified 2026-05-19

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-2743

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Seppmail Seppmail"

All exposed Seppmail Seppmail instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Seppmail"

HTTP body or banner mentions "Seppmail" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-2743