CVE-2026-27444 HIGH

CVE-2026-27444: Header Email Address Parsing

Vendor Seppmail
Product Secure Email Gateway
Weakness CWE-436
Published March 4, 2026
Last update March 4, 2026
View on NVD All CVEs

CVSS base score

7.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:H/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 4, 2026 CVE published
March 4, 2026 Record updated