CVE-2026-29135

HIGH

CVSS v3.1: 7.5 · EPSS: 0.0010 (28.4 percentile)

NetworkNo privilegesNo user interactionImproper Input Validation

Source data as of:

At a glance

Severity
HIGH
CVSS
7.5 v3.1 · NVD
EPSS
0.0010 (28.4 percentile) · FIRST.org
CISA KEV
No
Type
Improper Input Validation · NVD CWE
Attack conditions (CVSS vector)
NetworkNo privilegesNo user interaction · Source: NVD Vector
Affected vendors
seppmail
Published
2026-04-02 · Modified: 2026-04-16
References
Jump to references (1)

CVSS / EPSS / KEV

CVSS v3.1 7.5 / 10 HIGH Source: NVD
CVSS v4.0 5.3 / 10 MEDIUM Source: NVD
EPSS 0.0010 28.4 percentile Source: FIRST.org
CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

Description

SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to craft a password-tag that bypasses subject sanitization.

Record details

CVE ID
CVE-2026-29135
CVSS (v3.1)
7.5 (HIGH)
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploitability subscore
3.9
Impact subscore
3.6
EPSS
0.0010 (28.4 percentile) — 2026-04-17
CISA KEV
No
Weakness (CWE)
CWE-20
Affected vendors
seppmail
Affected configurations (CPE)
1
Published
2026-04-02
Modified
2026-04-16
Status
Analyzed

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

Related records

Other records sharing a factual facet, for cross-reference. A descriptive neighbourhood — ordering does not imply priority and is not a recommendation.

Same affected vendor

CVE-2026-29139 CRITICAL CVSS 9.8 CVE-2026-29133 CRITICAL CVSS 9.1 CVE-2026-29143 CRITICAL CVSS 9.1 CVE-2026-29131 HIGH CVSS 7.5

Same weakness type (CWE)

CVE-2026-27304 CRITICAL CVSS 9.3 CVE-2025-54236 CRITICAL CVSS 9.1 KEV CVE-2026-29133 CRITICAL CVSS 9.1 CVE-2026-29143 CRITICAL CVSS 9.1

Published the same year

CVE-2026-21643 CRITICAL CVSS 9.8 KEV CVE-2026-22738 CRITICAL CVSS 9.8 CVE-2026-27143 CRITICAL CVSS 9.8 CVE-2026-29139 CRITICAL CVSS 9.8
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