🛡️ CVE-2026-27444 — seppmail

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-436 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

SEPPmail Secure Email Gateway before version 15.0.1 incorrectly interprets email addresses in the email headers, causing an interpretation conflict with other mail infrastructure that allows an attacker to fake the source of the email or decrypt it.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity high, availability none.

Weakness class

CVE-2026-27444 is classified as CWE-436: Interpretation Conflict. Two components parse the same data differently, so a check in one is bypassed in the other.

Affected software

CVE-2026-27444 is recorded against 1 package.

  • seppmail (fixed in 15.0.1)

Timeline and source

Published on 4 March 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

downloads.seppmail.com

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE CWE-436
Public Exploit ✅ No
Source NVD
Published 2026-03-04
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
seppmail — 15.0.1

Similar Threats

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