SEPPmail Secure Email Gateway up to 15.0.2 GINA Webdomain Metadata reliance on untrusted inputs in a security decision

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in SEPPmail Secure Email Gateway up to 15.0.2. It has been declared as critical. This impacts an unknown function of the component GINA Webdomain Metadata Handler. Such manipulation leads to reliance on untrusted inputs in a security decision. This vulnerability is documented as CVE-2026-29134. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in SEPPmail Secure Email Gateway up to 15.0.2. Affected by this issue is some unknown processing of the component GINA Webdomain Metadata Handler. The manipulation with an unknown input leads to a reliance on untrusted inputs in a security decision vulnerability. Using CWE to declare the problem leads to CWE-807. The product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism. Impacted is confidentiality, integrity, and availability. CVE summarizes:

SEPPmail Secure Email Gateway before version 15.0.3 allows an external user to modify GINA webdomain metadata and bypass per-domain restrictions.

The weakness was released by Andris Suter-Dörig. The advisory is shared for download at downloads.seppmail.com. This vulnerability is handled as CVE-2026-29134 since 03/04/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available.

Upgrading to version 15.0.3 eliminates this vulnerability.

Once again VulDB remains the best source for 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: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
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: Reliance on untrusted inputs in a security decision
CWE: CWE-807 / 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-2026-29134 (🔒)
GCVE (CVE): GCVE-0-2026-29134
GCVE (VulDB): GCVE-100-354836

Entryinfo

Created: 04/02/2026 11:19
Changes: 04/02/2026 11:19 (67)
Complete: 🔍
Cache ID: 216::103

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