CVE-2024-21351

CRITICALNVD 7.69.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2024-02-13), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.6 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 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: 30%CVSS: 7.6Exploit: 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.

Windows SmartScreen Security Feature Bypass Vulnerability

CVSS v3
7.6
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
30%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

February 13, 2024

Last Modified

October 28, 2025

Advisory Details (2)

Auto-updated Jun 4, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, 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-2024-21351
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21351

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 89× in last 7d / 359× 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 868 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2024-21351?
CVE-2024-21351 is a critical vulnerability published on February 13, 2024. Windows SmartScreen Security Feature Bypass Vulnerability
When was CVE-2024-21351 disclosed?
CVE-2024-21351 was first published in the National Vulnerability Database on February 13, 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-2024-21351 actively exploited?
Yes. CISA added CVE-2024-21351 to the Known Exploited Vulnerabilities catalog on February 13, 2024, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2024-21351?
CVE-2024-21351 has a CVSS v3 base score of 7.6 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2024-21351?
CVE-2024-21351 affects Microsoft Windows. 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-2024-21351?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-21351, 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.

Dependency Blast Radius

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