CVE-2026-84831Mandatory MFA bypass before enrollment
Updated under an hour ago ()
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It affects SEPPmail AG SEPPmail Secure Email Gateway (SEG). Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.7 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-287, CWE-306
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- NCSC.ch
- NVD analysis
- Deferred
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
SEPPmail AG SEPPmail Secure Email Gateway (SEG) seppmail:secure_email_gateway_seg (from the name) | before 15.0.7 | CNA record |
References
- https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.