Cyber Resilience

CVE-2026-29142

Medium

Published: 02 April 2026

Published
02 April 2026
Modified
16 April 2026
KEV Added
—
Patch
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CVSS Score v4 6.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0013 2.6th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-29142 is a medium-severity Missing Cryptographic Step (CWE-325) vulnerability in Seppmail Secure Email Gateway. Its CVSS base score is 6.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Email Spoofing (T1684.002); ranked at the 2.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A04:2025 Cryptographic Failures

EU & UK References

Vulnerability details

SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to forge a GINA-encrypted email.

CWE(s)
CWE-325

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1684.002 Email Spoofing Stealth
Adversaries may fake, or spoof, a sender’s identity by modifying the value of relevant email headers in order to establish contact with victims under false pretenses.
attack.mitre.org →
Why these techniques?

CWE-325 missing crypto step directly enables forging of GINA-encrypted emails, facilitating email spoofing.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

Affected Assets

seppmail
secure email gateway
≤ 15.0.3

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References