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 61% 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
9.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.2Exploit: 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 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)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity92% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 18, 2026

Advisory Details (2)

Auto-updated Aug 29, 2026
No patch confirmed yet.
generic

SeppMail Secure E-Mail Gateway: Critical RCE and LFI Vulnerabilities - InfoGuard Labs

https://labs.infoguard.ch/posts/seppmail_secure_e-mail_gateway_rce_vulnerabilities_cve-2026-2743_cve-2026-7864_cve-2026-44127_cve-2026-44128/
generic

15.0.6.1 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 5× in last 7d / 83× 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 284 total refreshes for this CVE.

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

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 0% probability of exploitation in the next 30 days, which ranks it in the top 60.9% of all scored CVEs.
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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