CVE-2023-36584

CRITICALNVD 5.49.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-11-16), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 5.4 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: 3%CVSS: 5.4Exploit: cisa kev · ssvc activeExposed: 0

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

Windows Mark of the Web Security Feature Bypass Vulnerability

CVSS v3
5.4
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
3%
EPSS %ILE
86%
KEV
⚠ Exploited

Published

October 10, 2023

Last Modified

October 28, 2025

Advisory Details (2)

Auto-updated Jun 13, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa, microsoft.
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-2023-36584
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-2023-36584

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 914 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2023-36584?
CVE-2023-36584 is a critical vulnerability published on October 10, 2023. Windows Mark of the Web Security Feature Bypass Vulnerability
When was CVE-2023-36584 disclosed?
CVE-2023-36584 was first published in the National Vulnerability Database on October 10, 2023, 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-2023-36584 actively exploited?
Yes. CISA added CVE-2023-36584 to the Known Exploited Vulnerabilities catalog on November 16, 2023, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-36584?
CVE-2023-36584 has a CVSS v3 base score of 5.4 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2023-36584?
CVE-2023-36584 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-2023-36584?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-36584, 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

Explore the affected products and dependency analysis for CVE-2023-36584

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