CVE-2020-3186

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 1.4% (70th percentile of EPSS-scored CVEs). 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
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.4%CVSS: 5.3Exploit: None knownExposed services: Not assessed

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

A vulnerability in the management access list configuration of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass a configured management interface access list on an affected system. The vulnerability is due to the configuration of different management access lists, with ports allowed in one access list and denied in another. An attacker could exploit this vulnerability by sending crafted remote management traffic to the local IP address of an affected system. A successful exploit could allow the attacker to bypass the configured management access list policies, and traffic to the management interface would not be properly denied.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100CISA SSVC

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
Severity53% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
1.4%
EPSS %ILE
70th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

May 6, 2020

Last Modified

August 11, 2026

Advisory Details (1)

Auto-updated Aug 12, 2026
No patch confirmed yet.
generic

Cisco Firepower Threat Defense Software Management Access List Bypass Vulnerability

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-accesslist-bypass-5dZs5qZp

Vendor Advisories for CVE-2020-3186(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 4× 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 150 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2020-3186?
CVE-2020-3186 is a medium vulnerability published on May 6, 2020. A vulnerability in the management access list configuration of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass a configured management interface access list on an affected system. The vulnerability is due to the configuration of different…
When was CVE-2020-3186 disclosed?
CVE-2020-3186 was first published on May 6, 2020, with the most recent update on August 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-3186 actively exploited?
CVE-2020-3186 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.4% probability of exploitation in the next 30 days (70th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-3186?
CVE-2020-3186 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2020-3186?
No fix for CVE-2020-3186 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2020-3186 are linked in the Vendor Advisories panel on this page.

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