VulnerabilityDeferred

CVE-2026-84831

An attacker with the password for an MFA-required but unenrolled account can access protected functionality without providing a second factor.

HIGH 7.7EPSS 0.45%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public 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.

CVSS 4.0: 7.7 HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.45% probability · 38th percentile
CISA KEV: Not listed
Weakness: CWE-287, CWE-306
Source: vulnerability@ncsc.ch

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.