CVE-2026-44126

CRITICALNVD 9.29.2—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.2 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 63% 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, nvd
9.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.2Exploit: NoneExposed: 0

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

SEPPmail Secure Email Gateway before version 15.0.4 insecurely deserializes untrusted data, which can be reached from the new GINA UI and may allow unauthenticated remote attackers to execute code via a crafted serialized object.

CVSS v3
9.2
EG Score
9.2(medium)
EPSS
37.7%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 18, 2026

Advisory Details (1)

Auto-updated May 8, 2026
No patch confirmed yet.
generic

15.0.4.1 Hotfix Release

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

Vendor Advisories for CVE-2026-44126(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 45× 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.

Showing the most recent 100 of 253 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-13 22:30 UTCEPSS rescore
  4. 2026-07-13 06:13 UTCEPSS rescore
  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-11 08:27 UTCEPSS rescore
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-08 15:16 UTCEPSS rescore
  9. 2026-07-07 13:46 UTCEPSS rescore
  10. 2026-07-06 16:27 UTCEPSS rescore
  11. 2026-07-06 02:23 UTCEPSS rescore
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-01 15:07 UTCEPSS rescore
  15. 2026-06-30 23:22 UTCEPSS rescore
  16. 2026-06-29 14:06 UTCEPSS rescore
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 08:56 UTCEG score recompute
  19. 2026-06-28 08:55 UTCGHSA enrichment
  20. 2026-06-28 05:07 UTCEG score recompute
  21. 2026-06-28 05:07 UTCGHSA enrichment
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-27 13:52 UTCEG score recompute
  24. 2026-06-27 13:52 UTCGHSA enrichment
  25. 2026-06-27 03:08 UTCEPSS rescore
Show 75 more
  1. 2026-06-26 21:30 UTCEG score recompute
  2. 2026-06-26 21:30 UTCGHSA enrichment
  3. 2026-06-25 13:49 UTCEPSS rescore
  4. 2026-06-25 13:49 UTCEPSS rescore
  5. 2026-06-24 14:05 UTCEPSS rescore
  6. 2026-06-23 21:33 UTCEPSS rescore
  7. 2026-06-22 14:25 UTCEPSS rescore
  8. 2026-06-22 14:25 UTCEPSS rescore
  9. 2026-06-21 14:56 UTCEPSS rescore
  10. 2026-06-21 14:56 UTCEPSS rescore
  11. 2026-06-21 01:59 UTCEPSS rescore
  12. 2026-06-19 19:25 UTCEPSS rescore
  13. 2026-06-18 17:52 UTCEPSS rescore
  14. 2026-06-18 17:52 UTCEPSS rescore
  15. 2026-06-17 17:53 UTCEPSS rescore
  16. 2026-06-17 05:51 UTCEG score recompute
  17. 2026-06-17 05:51 UTCGHSA enrichment
  18. 2026-06-17 01:56 UTCEG score recompute
  19. 2026-06-17 01:55 UTCGHSA enrichment
  20. 2026-06-16 17:52 UTCEPSS rescore
  21. 2026-06-15 17:49 UTCEPSS rescore
  22. 2026-06-15 05:42 UTCEG score recompute
  23. 2026-06-15 05:42 UTCGHSA enrichment
  24. 2026-06-15 02:05 UTCEG score recompute
  25. 2026-06-15 02:05 UTCGHSA enrichment
  26. 2026-06-14 22:24 UTCEG score recompute
  27. 2026-06-14 22:24 UTCGHSA enrichment
  28. 2026-06-14 18:46 UTCEG score recompute
  29. 2026-06-14 18:46 UTCGHSA enrichment
  30. 2026-06-14 15:10 UTCEG score recompute
  31. 2026-06-14 15:09 UTCGHSA enrichment
  32. 2026-06-14 10:44 UTCEG score recompute
  33. 2026-06-14 10:43 UTCGHSA enrichment
  34. 2026-06-14 06:47 UTCEG score recompute
  35. 2026-06-14 06:46 UTCGHSA enrichment
  36. 2026-06-14 02:58 UTCEG score recompute
  37. 2026-06-14 02:58 UTCGHSA enrichment
  38. 2026-06-13 23:00 UTCEPSS rescore
  39. 2026-06-13 00:03 UTCEG score recompute
  40. 2026-06-13 00:03 UTCGHSA enrichment
  41. 2026-06-12 23:12 UTCEPSS rescore
  42. 2026-06-12 23:12 UTCEPSS rescore
  43. 2026-06-12 20:24 UTCEG score recompute
  44. 2026-06-12 20:24 UTCGHSA enrichment
  45. 2026-06-12 11:16 UTCEG score recompute
  46. 2026-06-12 11:16 UTCGHSA enrichment
  47. 2026-06-12 07:39 UTCEG score recompute
  48. 2026-06-12 07:39 UTCGHSA enrichment
  49. 2026-06-12 04:02 UTCEG score recompute
  50. 2026-06-12 04:02 UTCGHSA enrichment
  51. 2026-06-12 00:25 UTCEG score recompute
  52. 2026-06-12 00:25 UTCGHSA enrichment
  53. 2026-06-11 20:48 UTCEG score recompute
  54. 2026-06-11 20:48 UTCGHSA enrichment
  55. 2026-06-11 17:11 UTCEG score recompute
  56. 2026-06-11 17:11 UTCGHSA enrichment
  57. 2026-06-11 14:00 UTCEPSS rescore
  58. 2026-06-11 11:53 UTCEG score recompute
  59. 2026-06-11 11:53 UTCGHSA enrichment
  60. 2026-06-11 08:16 UTCEG score recompute
  61. 2026-06-11 08:16 UTCGHSA enrichment
  62. 2026-06-11 04:22 UTCEG score recompute
  63. 2026-06-11 04:22 UTCGHSA enrichment
  64. 2026-06-11 00:34 UTCEG score recompute
  65. 2026-06-11 00:34 UTCGHSA enrichment
  66. 2026-06-10 22:18 UTCEPSS rescore
  67. 2026-06-10 20:32 UTCEG score recompute
  68. 2026-06-10 20:32 UTCGHSA enrichment
  69. 2026-06-10 16:54 UTCEG score recompute
  70. 2026-06-10 16:54 UTCGHSA enrichment
  71. 2026-06-10 13:22 UTCEPSS rescore
  72. 2026-06-10 13:22 UTCEPSS rescore
  73. 2026-06-10 13:16 UTCEG score recompute
  74. 2026-06-10 13:16 UTCGHSA enrichment
  75. 2026-06-10 09:39 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-44126?
CVE-2026-44126 is a critical vulnerability published on May 8, 2026. SEPPmail Secure Email Gateway before version 15.0.4 insecurely deserializes untrusted data, which can be reached from the new GINA UI and may allow unauthenticated remote attackers to execute code via a crafted serialized object.
When was CVE-2026-44126 disclosed?
CVE-2026-44126 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44126 actively exploited?
CVE-2026-44126 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-44126?
CVE-2026-44126 has a CVSS v3 base score of 9.2 (NVD).
How do I remediate CVE-2026-44126?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44126, 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

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