CVE-2023-29336

CRITICALNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-05-09), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.8 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: 41%CVSS: 7.8Exploit: cisa kev · ssvc active · epss top5pct · public exploitExposed: 0

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

Win32k Elevation of Privilege Vulnerability

CVSS v3
7.8
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
41%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

May 9, 2023

Last Modified

October 28, 2025

Advisory Details (3)

Auto-updated Jun 3, 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-2023-29336
generic🟡 PoC Available

Microsoft Windows Server 2016 - Win32k Elevation of Privilege - Windows local Exploit

https://www.exploit-db.com/exploits/52301
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-2023-29336

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 91× in last 7d / 390× 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 1,285 total refreshes for this CVE.

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

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-52301
    First seen May 25, 2025

    Microsoft Windows Server 2016 - Win32k Elevation of Privilege

    Open source ↗
  • GitHub PoCm-cetin/CVE-2023-29336
    First seen Jun 9, 2023
    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2023-29336?
CVE-2023-29336 is a critical vulnerability published on May 9, 2023. Win32k Elevation of Privilege Vulnerability
When was CVE-2023-29336 disclosed?
CVE-2023-29336 was first published in the National Vulnerability Database on May 9, 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-2023-29336 actively exploited?
Yes. CISA added CVE-2023-29336 to the Known Exploited Vulnerabilities catalog on May 9, 2023, affecting Microsoft Win32k. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-29336?
CVE-2023-29336 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2023-29336?
CVE-2023-29336 affects Microsoft Win32k. 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-2023-29336?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-29336, 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-2023-29336

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