CVE-2026-27444

Header Email Address Parsing

Published Mar 4, 2026 CVSS 4.0 · 7.8 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Seppmail seppmail
CPEs cpe:2.3:a:seppmail:seppmail:*:*:*:*:*:*:*:*
Vendors & Products Seppmail seppmail
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Header Email Address Parsing
First Time appeared Seppmail
Seppmail seppmail Secure Email Gateway
Weaknesses CWE-436
CPEs cpe:2.3:a:seppmail:seppmail_secure_email_gateway:*:*:*:*:*:*:*:*
Vendors & Products Seppmail
Seppmail seppmail Secure Email Gateway
References
Metrics cvssV4_0

{'score': 7.8, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
NCSC.ch
Published
Updated
Mar 4, 2026, 7:28 PM
Reserved
Feb 19, 2026, 1:56 PM
Status
Analyzed
Published
Mar 4, 2026, 9:15 AM
Modified
Jun 17, 2026, 10:27 AM