CVE-2024-20399

CRITICALNVD 6.09.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2024-07-02), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 6.0 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 4%CVSS: 6.0Exploit: cisa kev · ssvc activeExposed: 0

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

A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated user in possession of Administrator credentials to execute arbitrary commands as root on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of arguments that are passed to specific configuration CLI commands. An attacker could exploit this vulnerability by including crafted input as the argument of an affected configuration CLI command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with the privileges of root. Note: To successfully exploit this vulnerability on a Cisco NX-OS device, an attacker must have Administrator credentials. The following Cisco devices already allow administrative users to access the underlying operating system through the bash-shell feature, so, for these devices, this vulnerability does not grant any additional privileges: Nexus 3000 Series Switches Nexus 7000 Series Switches that are running Cisco NX-OS Software releases 8.1(1) and later Nexus 9000 Series Switches in standalone NX-OS mode

CVSS v3
6.0
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: 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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
4%
EPSS %ILE
90%
KEV
⚠ Exploited

Published

July 1, 2024

Last Modified

October 28, 2025

Advisory Details (3)

Auto-updated Jun 13, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-20399
generic🔴 Active Exploitation

Cisco NX-OS Command Injection Vulnerability CVE-2024-20399: Insights and Defense Strategies

https://www.sygnia.co/threat-reports-and-advisories/china-nexus-threat-group-velvet-ant-exploits-cisco-0-day/
generic🔴 Active Exploitation

Cisco NX-OS Software CLI Command Injection Vulnerability

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cmd-injection-xD9OhyOP

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 43× in last 7d / 218× 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 451 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2024-20399?
CVE-2024-20399 is a critical vulnerability published on July 1, 2024. A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated user in possession of Administrator credentials to execute arbitrary commands as root on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of arguments that are…
When was CVE-2024-20399 disclosed?
CVE-2024-20399 was first published in the National Vulnerability Database on July 1, 2024, with the most recent update on October 28, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-20399 actively exploited?
Yes. CISA added CVE-2024-20399 to the Known Exploited Vulnerabilities catalog on July 2, 2024, affecting Cisco NX-OS. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2024-20399?
CVE-2024-20399 has a CVSS v3 base score of 6.0 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2024-20399?
CVE-2024-20399 affects Cisco NX-OS. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2024-20399?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-20399, 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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