CVE-2024-3393

CRITICALNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2024-12-30), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 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: 28%CVSS: 7.5Exploit: 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 Denial of Service vulnerability in the DNS Security feature of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to send a malicious packet through the data plane of the firewall that reboots the firewall. Repeated attempts to trigger this condition will cause the firewall to enter maintenance mode.

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
96(Attend)
EG Risk 96/100SSVC: 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%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
28%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

December 27, 2024

Last Modified

November 4, 2025

Advisory Details (2)

Auto-updated Jun 4, 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-2024-3393
generic

CVE-2024-3393 PAN-OS: Firewall Denial of Service (DoS) in DNS Security Using a Specially Crafted Packet

https://security.paloaltonetworks.com/CVE-2024-3393

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 57× in last 7d / 230× 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 840 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2024-3393?
CVE-2024-3393 is a critical vulnerability published on December 27, 2024. A Denial of Service vulnerability in the DNS Security feature of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to send a malicious packet through the data plane of the firewall that reboots the firewall. Repeated attempts to trigger this condition will cause the firewall to…
When was CVE-2024-3393 disclosed?
CVE-2024-3393 was first published in the National Vulnerability Database on December 27, 2024, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-3393 actively exploited?
Yes. CISA added CVE-2024-3393 to the Known Exploited Vulnerabilities catalog on December 30, 2024, affecting Palo Alto Networks PAN-OS. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2024-3393?
CVE-2024-3393 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2024-3393?
CVE-2024-3393 affects Palo Alto Networks PAN-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-2024-3393?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-3393, 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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