CVE-2026-84831 Details
Description
SEPPmail Secure Email Gateway before 15.0.7 creates a fully privileged session before required multi-factor authentication enrollment is completed. An attacker with the password for an MFA-required but unenrolled account can access protected functionality without providing a second factor.
A vulnerability exists in SEPPmail Secure Email Gateway versions prior to 15.0.7, allowing an attacker to bypass mandatory multi-factor authentication (MFA) for accounts that require it but have not completed the enrollment process. This issue arises because the gateway creates a fully privileged session before all MFA steps are finalized. As a result, an attacker with the password of an unenrolled account can access protected features without providing the required second authentication factor.
Users can update to SEPPmail Secure Email Gateway version 15.0.7 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 3, 2026CISA-ADP
Assessed Sep 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html | [email protected] | Release NotesVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
| CWE-306 | Missing Authentication for Critical Function | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| SEPPmail Secure Email Gateway | < 15.0.7 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 3, 2026 | New CVE Received | [email protected] |
| Sep 3, 2026 | CVE Modified | CISA-ADP |