CVE-2026-29139: CWE-288 Authentication Bypass Using an Alternate Path or Channel in SEPPmail Secure Email Gateway
CVE-2026-29139 is a high-severity authentication bypass vulnerability in SEPPmail Secure Email Gateway versions before 15. 0. 3. It allows an attacker to take over accounts by exploiting the GINA account initialization process to reset a victim's account password. The vulnerability has a CVSS 4. 0 base score of 7. 8, indicating a significant risk due to its network attack vector and lack of required privileges or user interaction. No known exploits are reported in the wild, and no official patch or remediation link is provided in the available data.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-29139) affects SEPPmail Secure Email Gateway prior to version 15.0.3. It involves an authentication bypass via an alternate path or channel (CWE-288) by abusing the GINA account initialization mechanism to reset account passwords, enabling account takeover. The CVSS 4.0 vector indicates the attack can be performed remotely without privileges or user interaction, with high scope and impact on confidentiality and integrity. The vulnerability is publicly disclosed but lacks explicit vendor patch information in the provided data.
Potential Impact
Successful exploitation allows an unauthenticated attacker to reset the password of any user account on the affected SEPPmail Secure Email Gateway, resulting in full account takeover. This compromises the confidentiality and integrity of the affected accounts and potentially the email gateway environment. The vulnerability is rated high severity with a CVSS score of 7.8, reflecting significant risk if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or fix link is provided, users should monitor SEPPmail advisories for updates. Until a fix is available, restrict network access to the SEPPmail Secure Email Gateway and consider additional authentication controls to mitigate risk.
CVE-2026-29139: CWE-288 Authentication Bypass Using an Alternate Path or Channel in SEPPmail Secure Email Gateway
Description
CVE-2026-29139 is a high-severity authentication bypass vulnerability in SEPPmail Secure Email Gateway versions before 15. 0. 3. It allows an attacker to take over accounts by exploiting the GINA account initialization process to reset a victim's account password. The vulnerability has a CVSS 4. 0 base score of 7. 8, indicating a significant risk due to its network attack vector and lack of required privileges or user interaction. No known exploits are reported in the wild, and no official patch or remediation link is provided in the available data.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-29139) affects SEPPmail Secure Email Gateway prior to version 15.0.3. It involves an authentication bypass via an alternate path or channel (CWE-288) by abusing the GINA account initialization mechanism to reset account passwords, enabling account takeover. The CVSS 4.0 vector indicates the attack can be performed remotely without privileges or user interaction, with high scope and impact on confidentiality and integrity. The vulnerability is publicly disclosed but lacks explicit vendor patch information in the provided data.
Potential Impact
Successful exploitation allows an unauthenticated attacker to reset the password of any user account on the affected SEPPmail Secure Email Gateway, resulting in full account takeover. This compromises the confidentiality and integrity of the affected accounts and potentially the email gateway environment. The vulnerability is rated high severity with a CVSS score of 7.8, reflecting significant risk if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or fix link is provided, users should monitor SEPPmail advisories for updates. Until a fix is available, restrict network access to the SEPPmail Secure Email Gateway and consider additional authentication controls to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- NCSC.ch
- Date Reserved
- 2026-03-04T09:08:03.278Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69ce3203e6bfc5ba1dc418ae
Added to database: 4/2/2026, 9:08:19 AM
Last enriched: 4/10/2026, 12:12:20 AM
Last updated: 5/20/2026, 8:51:36 PM
Views: 91
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