CVE-2019-25364

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-02-19. 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.

MailCarrier 2.51 contains a buffer overflow vulnerability in the POP3 USER command that allows remote attackers to execute arbitrary code. Attackers can send a crafted oversized buffer to the POP3 service, overwriting memory and potentially gaining remote system access.

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
57%
KEV
Not listed

Published

February 18, 2026

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

탭스랩(주)

https://www.tabslab.com/
generic🟡 PoC Available

Win10 MailCarrier 2.51 - 'POP3 User' Remote Buffer Overflow - Windows remote Exploit

https://www.exploit-db.com/exploits/47554

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 23× 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. 2026-09-18 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 47 more
  1. 2026-08-17 13:43 UTCEPSS rescore
  2. 2026-08-16 14:52 UTCEPSS rescore
  3. 2026-08-16 02:10 UTCEPSS rescore
  4. 2026-08-15 02:15 UTCEG score recompute
  5. 2026-08-15 02:15 UTCGHSA enrichment
  6. 2026-08-15 01:26 UTCEPSS rescore
  7. 2026-08-14 21:53 UTCGHSA enrichment
  8. 2026-08-14 14:07 UTCGHSA enrichment
  9. 2026-08-14 09:44 UTCEG score recompute
  10. 2026-08-14 09:44 UTCGHSA enrichment
  11. 2026-08-13 01:59 UTCEG score recompute
  12. 2026-08-13 01:59 UTCGHSA enrichment
  13. 2026-08-12 13:47 UTCEPSS rescore
  14. 2026-08-11 07:22 UTCEG score recompute
  15. 2026-08-11 07:22 UTCGHSA enrichment
  16. 2026-08-10 09:40 UTCGHSA enrichment
  17. 2026-08-10 03:12 UTCGHSA enrichment
  18. 2026-08-09 22:49 UTCGHSA enrichment
  19. 2026-08-09 18:26 UTCGHSA enrichment
  20. 2026-08-09 14:04 UTCEG score recompute
  21. 2026-08-09 14:04 UTCGHSA enrichment
  22. 2026-08-09 13:43 UTCEPSS rescore
  23. 2026-08-08 16:33 UTCEPSS rescore
  24. 2026-08-08 11:49 UTCGHSA enrichment
  25. 2026-08-08 06:25 UTCGHSA enrichment
  26. 2026-08-08 02:02 UTCGHSA enrichment
  27. 2026-08-07 21:39 UTCEG score recompute
  28. 2026-08-07 21:39 UTCGHSA enrichment
  29. 2026-08-07 16:23 UTCEPSS rescore
  30. 2026-08-06 13:43 UTCEPSS rescore
  31. 2026-08-06 07:56 UTCGHSA enrichment
  32. 2026-08-06 03:33 UTCEG score recompute
  33. 2026-08-06 03:33 UTCGHSA enrichment
  34. 2026-08-05 19:13 UTCEPSS rescore
  35. 2026-08-04 15:05 UTCEPSS rescore
  36. 2026-08-03 01:31 UTCGHSA enrichment
  37. 2026-08-02 20:18 UTCEG score recompute
  38. 2026-08-02 20:18 UTCGHSA enrichment
  39. 2026-08-02 02:23 UTCEPSS rescore
  40. 2026-08-01 04:12 UTCEPSS rescore
  41. 2026-07-30 16:24 UTCEPSS rescore
  42. 2026-07-30 01:27 UTCEPSS rescore
  43. 2026-07-28 15:32 UTCEPSS rescore
  44. 2026-07-28 02:27 UTCEG score recompute
  45. 2026-07-28 02:27 UTCGHSA enrichment
  46. 2026-07-27 13:27 UTCEG score recompute
  47. 2026-07-27 13:27 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2019-25364?
CVE-2019-25364 is a critical vulnerability published on February 18, 2026. MailCarrier 2.51 contains a buffer overflow vulnerability in the POP3 USER command that allows remote attackers to execute arbitrary code. Attackers can send a crafted oversized buffer to the POP3 service, overwriting memory and potentially gaining remote system access.
When was CVE-2019-25364 disclosed?
CVE-2019-25364 was first published in the National Vulnerability Database on February 18, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-25364 actively exploited?
CVE-2019-25364 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 42.8% of all scored CVEs.
What is the CVSS score of CVE-2019-25364?
CVE-2019-25364 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2019-25364?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-25364, 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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