CVE-2024-20359

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 2024-04-24), 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: 19%CVSS: 6.0Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

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

A vulnerability in a legacy capability that allowed for the preloading of VPN clients and plug-ins and that has been available in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary code with root-level privileges. Administrator-level privileges are required to exploit this vulnerability. This vulnerability is due to improper validation of a file when it is read from system flash memory. An attacker could exploit this vulnerability by copying a crafted file to the disk0: file system of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the affected device after the next reload of the device, which could alter system behavior. Because the injected code could persist across device reboots, Cisco has raised the Security Impact Rating (SIR) of this advisory from Medium to High.

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
19%
EPSS %ILE
97%
KEV
⚠ Exploited

Published

April 24, 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-2024-20359
generic

ArcaneDoor - New espionage-focused campaign found targeting perimeter network devices

https://blog.talosintelligence.com/arcanedoor-new-espionage-focused-campaign-found-targeting-perimeter-network-devices/
generic

Cisco Adaptive Security Appliance and Firepower Threat Defense Software Persistent Local Code Execution Vulnerability

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-persist-rce-FLsNXF4h

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 57× in last 7d / 227× 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 549 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2024-20359?
CVE-2024-20359 is a critical vulnerability published on April 24, 2024. A vulnerability in a legacy capability that allowed for the preloading of VPN clients and plug-ins and that has been available in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary code…
When was CVE-2024-20359 disclosed?
CVE-2024-20359 was first published in the National Vulnerability Database on April 24, 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-2024-20359 actively exploited?
Yes. CISA added CVE-2024-20359 to the Known Exploited Vulnerabilities catalog on April 24, 2024, affecting Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2024-20359?
CVE-2024-20359 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-2024-20359?
CVE-2024-20359 affects Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD). 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-2024-20359?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-20359, 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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