CVE-2026-84831CWE-287CWE-306

CVE-2026-84831

published September 3, 2026

CVSS
7.7
EPSS
0%
Percentile
39.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
7.7 · NONE
CVSS v4.0
7.7 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00470 · 39.6th percentile
Weaknesses
CWE-287 · Improper Authentication; CWE-306 · Missing Authentication for Critical Function
Published
2026-09-03T17:06Z
References (1)
https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html · [email protected]
EPSS history
Timeline
  • 04 SEP 03:44Z
    EPSS moved — → 0%
    epss
  • 03 SEP 08:43Z
    Mandatory MFA bypass before enrollment
    cvelistv5