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CVE-2026-84831

Mandatory MFA bypass before enrollment

HIGH
7.7
CVSS Score
Published: September 3, 2026 at 08:43 AM UTC
Updated: October 8, 2026 at 11:15 AM UTC
1 product affected across 1 vendorSecure Email Gateway

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Severity
HIGH7.7
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Secure Email Gateway· Seppmail
60%
v < 15.0.7
Affected range stops below 15.0.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.7HIGHNCSC.ch
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-287CWE-306

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