CVE-2019-25646

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-03-24. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

Tabs Mail Carrier 2.5.1 contains a buffer overflow vulnerability in the MAIL FROM SMTP command that allows remote attackers to execute arbitrary code by sending a crafted MAIL FROM parameter. Attackers can connect to the SMTP service on port 25 and send a malicious MAIL FROM command with an oversized buffer to overwrite the EIP register and execute a bind shell payload.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
59%
KEV
Not listed

Published

March 24, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Sep 19, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Tabs Mail Carrier 2.5.1 Buffer Overflow via MAIL FROM | Advisories | VulnCheck

https://www.vulncheck.com/advisories/tabs-mail-carrier-buffer-overflow-via-mail-from
generic🟡 PoC Available

Mail Carrier 2.5.1 - 'MAIL FROM' Buffer Overflow - Windows remote Exploit

https://www.exploit-db.com/exploits/46547

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 22× 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 109 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2019-25646?
CVE-2019-25646 is a critical vulnerability published on March 24, 2026. Tabs Mail Carrier 2.5.1 contains a buffer overflow vulnerability in the MAIL FROM SMTP command that allows remote attackers to execute arbitrary code by sending a crafted MAIL FROM parameter. Attackers can connect to the SMTP service on port 25 and send a malicious MAIL FROM command with an…
When was CVE-2019-25646 disclosed?
CVE-2019-25646 was first published in the National Vulnerability Database on March 24, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-25646 actively exploited?
CVE-2019-25646 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 41.5% of all scored CVEs.
What is the CVSS score of CVE-2019-25646?
CVE-2019-25646 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2019-25646?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-25646, 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.

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