CVE-2026-84831

HIGHPre-NVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 62% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.7Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
7.7
EG Score
7.7(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity77% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

September 3, 2026

Last Modified

September 3, 2026

Advisory Details (1)

Auto-updated Sep 3, 2026
No patch confirmed yet.
generic

15.0.7 Bugfix Release

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

Vendor Advisories for CVE-2026-84831(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 27× in last 7d / 66× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-20 21:08 UTCEG score recompute
  2. 2026-09-20 21:08 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 08:10 UTCGHSA enrichment
  5. 2026-09-19 18:48 UTCEG score recompute
  6. 2026-09-19 18:47 UTCGHSA enrichment
  7. 2026-09-19 05:49 UTCEG score recompute
  8. 2026-09-19 05:49 UTCGHSA enrichment
  9. 2026-09-18 19:28 UTCEPSS rescore
  10. 2026-09-18 16:48 UTCGHSA enrichment
  11. 2026-09-18 03:50 UTCEG score recompute
  12. 2026-09-18 03:50 UTCGHSA enrichment
  13. 2026-09-17 19:32 UTCEPSS rescore
  14. 2026-09-17 14:52 UTCGHSA enrichment
  15. 2026-09-17 01:54 UTCEG score recompute
  16. 2026-09-17 01:54 UTCGHSA enrichment
  17. 2026-09-16 14:09 UTCEPSS rescore
  18. 2026-09-16 12:56 UTCEG score recompute
  19. 2026-09-16 12:56 UTCGHSA enrichment
  20. 2026-09-16 05:15 UTCEPSS rescore
  21. 2026-09-15 23:58 UTCGHSA enrichment
  22. 2026-09-15 11:00 UTCEG score recompute
  23. 2026-09-15 11:00 UTCGHSA enrichment
  24. 2026-09-15 03:12 UTCEPSS rescore
  25. 2026-09-15 03:12 UTCEPSS rescore
Show 41 more
  1. 2026-09-14 22:02 UTCGHSA enrichment
  2. 2026-09-14 09:01 UTCGHSA enrichment
  3. 2026-09-13 20:02 UTCEG score recompute
  4. 2026-09-13 20:02 UTCGHSA enrichment
  5. 2026-09-13 07:04 UTCGHSA enrichment
  6. 2026-09-12 18:06 UTCEG score recompute
  7. 2026-09-12 18:06 UTCGHSA enrichment
  8. 2026-09-12 05:06 UTCGHSA enrichment
  9. 2026-09-11 16:08 UTCEG score recompute
  10. 2026-09-11 16:08 UTCGHSA enrichment
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 03:06 UTCGHSA enrichment
  14. 2026-09-10 14:07 UTCEG score recompute
  15. 2026-09-10 14:07 UTCGHSA enrichment
  16. 2026-09-10 01:07 UTCGHSA enrichment
  17. 2026-09-09 12:09 UTCGHSA enrichment
  18. 2026-09-08 23:10 UTCEG score recompute
  19. 2026-09-08 23:10 UTCGHSA enrichment
  20. 2026-09-08 22:01 UTCEPSS rescore
  21. 2026-09-08 03:49 UTCEG score recompute
  22. 2026-09-08 03:49 UTCGHSA enrichment
  23. 2026-09-07 14:51 UTCGHSA enrichment
  24. 2026-09-07 00:17 UTCEG score recompute
  25. 2026-09-07 00:17 UTCGHSA enrichment
  26. 2026-09-06 13:48 UTCEPSS rescore
  27. 2026-09-06 11:16 UTCGHSA enrichment
  28. 2026-09-05 22:18 UTCEG score recompute
  29. 2026-09-05 22:17 UTCGHSA enrichment
  30. 2026-09-05 15:31 UTCEPSS rescore
  31. 2026-09-05 09:19 UTCGHSA enrichment
  32. 2026-09-04 20:21 UTCEG score recompute
  33. 2026-09-04 20:21 UTCGHSA enrichment
  34. 2026-09-04 07:17 UTCEG score recompute
  35. 2026-09-04 07:17 UTCGHSA enrichment
  36. 2026-09-04 05:07 UTCEPSS rescore
  37. 2026-09-03 18:18 UTCGHSA enrichment
  38. 2026-09-03 13:15 UTCEG score recompute
  39. 2026-09-03 12:49 UTCEG score recompute
  40. 2026-09-03 08:51 UTCEG score recompute
  41. 2026-09-03 08:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84831?
CVE-2026-84831 is a high vulnerability published on September 3, 2026. 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.
When was CVE-2026-84831 disclosed?
CVE-2026-84831 was first published in the National Vulnerability Database on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84831 actively exploited?
CVE-2026-84831 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.6% of all scored CVEs.
What is the CVSS score of CVE-2026-84831?
CVE-2026-84831 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-84831?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84831, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-84831

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