CVE-2026-29141 | SEPPmail Secure Email Gateway up to 15.0.2 Subject input validation

VDB-354841 · CVE-2026-29141 · GCVE-0-2026-29141 SEPPMAIL SECURE EMAIL GATEWAY UP TO 15.0.2 SUBJECT INPUT VALIDATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.1 $0-$5k 1.43+ 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. Productinfo Vendor SEPPmail Name Secure Email Gateway Version 15.0.0 15.0.1 15.0.2 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 Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock 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 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock 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: 99:394:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸