CVE-2026-29131 Details
Description
SEPPmail Secure Email Gateway before version 15.0.3 allows attackers with a specially crafted email address to read the contents of emails encrypted for other users.
A vulnerability in SEPPmail Secure Email Gateway versions prior to 15.0.3 allows attackers to read emails encrypted for other users by using a specially crafted email address. This issue arises from improper handling of S/MIME decryption, which can lead to unauthorized access to encrypted email contents.
Users can update to SEPPmail Secure Email Gateway version 15.0.3 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html#seppmail-vulnerability-disclosure-1503 | [email protected] | Release Notes |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-90 | Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| seppmail secure email gateway | < 15.0.3 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 16, 2026 | Initial Analysis | [email protected] |
| Apr 2, 2026 | New CVE Received | [email protected] |