SEPPmail Secure Email Gateway up to 15.0.2 Subject input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in SEPPmail Secure Email Gateway up to 15.0.2. This vulnerability affects unknown code of the component Subject Handler. This manipulation causes input validation. This vulnerability is handled as CVE-2026-29141. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in SEPPmail Secure Email Gateway up to 15.0.2. It has been declared as problematic. Affected by this vulnerability is an unknown code of the component Subject Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect integrity. The summary by CVE is:

SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge tags such as [signed OK].

The weakness was released by Andris Suter-Dörig. The advisory is shared at downloads.seppmail.com. This vulnerability is known as CVE-2026-29141 since 03/04/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

Upgrading to version 15.0.3 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Secure Email Gateway 15.0.3

Timelineinfo

03/04/2026 CVE reserved
04/02/2026 +28 days Advisory disclosed
04/02/2026 +0 days VulDB entry created
04/02/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: downloads.seppmail.com
Researcher: Andris Suter-Dörig
Status: Confirmed

CVE: CVE-2026-29141 (🔒)
GCVE (CVE): GCVE-0-2026-29141
GCVE (VulDB): GCVE-100-354841

Entryinfo

Created: 04/02/2026 11:21
Changes: 04/02/2026 11:21 (67)
Complete: 🔍
Cache ID: 216:D3B:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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