CVE-2024-11667

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2024-12-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 3 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 2.9%CVSS: 9.8Exploit: cisa kev · ssvc active · kev ransomwareExposed services: Not assessed

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

A directory traversal vulnerability in the web management interface of Zyxel ATP series firmware versions V5.00 through V5.38, USG FLEX series firmware versions V5.00 through V5.38, USG FLEX 50(W) series firmware versions V5.10 through V5.38, and USG20(W)-VPN series firmware versions V5.10 through V5.38 could allow an attacker to download or upload files via a crafted URL.

CVSS v3
9.8
EG Score
9.8CRITICALhigh confidence
EG Risk
99
EG Risk 99/100CISA 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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
CISA SSVC: Attend at low or medium mission impact; Act at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation sooner than your standard update timelines at low or medium mission impact and as soon as possible at high, and watch the vendor's advisory for the fix.
EPSS PROB
2.9%
EPSS %ILE
86th
KEV
⚠ Exploited

CISA SSVCAttend at low or medium mission impact; Act at high (mission-essential systems).

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

Exploitation active (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

November 27, 2024

Last Modified

August 5, 2026

Advisory Details (2)

Auto-updated Oct 7, 2026
⚠️ Active exploitation confirmed. No fix on record yet. Sources: cisa.
cisa🔴 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-2024-11667
generic

Zyxel security advisory: protecting against recent firewall threats | Zyxel Networks

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-protecting-against-recent-firewall-threats-11-27-2024

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 58× in last 7d / 264× 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 1,149 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2024-11667?
CVE-2024-11667 is a critical vulnerability published on November 27, 2024. A directory traversal vulnerability in the web management interface of Zyxel ATP series firmware versions V5.00 through V5.38, USG FLEX series firmware versions V5.00 through V5.38, USG FLEX 50(W) series firmware versions V5.10 through V5.38, and USG20(W)-VPN series firmware versions V5.10 through…
When was CVE-2024-11667 disclosed?
CVE-2024-11667 was first published on November 27, 2024, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-11667 actively exploited?
Yes. CISA added CVE-2024-11667 to the Known Exploited Vulnerabilities catalog on December 3, 2024, affecting Zyxel Multiple Firewalls. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation, and watch the vendor's advisory for the fix.
What is the CVSS score of CVE-2024-11667?
CVE-2024-11667 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2024-11667?
CVE-2024-11667 affects Zyxel Multiple Firewalls.
How do I remediate CVE-2024-11667?
No fix for CVE-2024-11667 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.

Dependency Blast Radius

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