CVE-2019-1947

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 1.9%, top 22% 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
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.6Exploit: None knownExposed: 0

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

A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause the CPU utilization to increase to 100 percent, causing a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of email messages that contain large attachments. An attacker could exploit this vulnerability by sending a malicious email message through the targeted device. A successful exploit could allow the attacker to cause a permanent DoS condition due to high CPU utilization. This vulnerability may require manual intervention to recover the ESA.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity86% × 45%
Exploitation2% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
78%
KEV
Not listed

Published

September 23, 2020

Last Modified

November 21, 2024

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 26× 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 116 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2019-1947?
CVE-2019-1947 is a high vulnerability published on September 23, 2020. A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause the CPU utilization to increase to 100 percent, causing a denial of service (DoS) condition on an affected device. The…
When was CVE-2019-1947 disclosed?
CVE-2019-1947 was first published in the National Vulnerability Database on September 23, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-1947 actively exploited?
CVE-2019-1947 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 21.7% of all scored CVEs.
What is the CVSS score of CVE-2019-1947?
CVE-2019-1947 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2019-1947?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-1947, 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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