What is CVE-2026-29132?

CVE-2026-29132 is a high-severity vulnerability in Seppmail Secure Email Gateway, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-04-02.

How severe is CVE-2026-29132?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Seppmail Secure Email Gateway

CVE-2026-29132

SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker with access to a victim's GINA account to bypass a second-password check and read protected emails.

Vulnerability class: Broken Authentication

EPSS: 0.003 (16.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Seppmail Secure Email Gateway — versions 0
Seppmail Secure_email_gateway

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

vulnerability@ncsc.ch (release-notes, Release Notes)

Frequently asked questions

What is CVE-2026-29132?: CVE-2026-29132 is a high-severity vulnerability in Seppmail Secure Email Gateway, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-04-02.
How severe is CVE-2026-29132?: High severity. CVSS v3 base score is 7.5 out of 10.