CVE-2019-0803

HIGHNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), 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
7.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 45%CVSS: 7.8Exploit: NoneExposed: 0

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

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-0685, CVE-2019-0859.

CVSS v3
7.8
EG Score
9.0(high)
EPSS
98.6%
KEV
⚠ Exploited

Published

April 9, 2019

Last Modified

October 29, 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-2019-0803
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

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

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0803
generic

Packet Storm

http://packetstormsecurity.com/files/153034/Microsoft-Windows-Win32k-Privilege-Escalation.html

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 133× in last 7d / 573× 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 712 total refreshes for this CVE.

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

  • GitHub PoCExpLife0011/CVE-2019-0803
    First seen May 17, 2019

    Win32k Elevation of Privilege Poc

    Open source ↗
  • Exploit-DBEDB-46920
    First seen May 15, 2019

    Microsoft Windows - 'Win32k' Local Privilege Escalation

    Open source ↗

Frequently asked(6)

What is CVE-2019-0803?
CVE-2019-0803 is a high vulnerability published on April 9, 2019. An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-0685, CVE-2019-0859.
When was CVE-2019-0803 disclosed?
CVE-2019-0803 was first published in the National Vulnerability Database on April 9, 2019, with the most recent update on October 29, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-0803 actively exploited?
Yes. CISA added CVE-2019-0803 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Microsoft Win32k. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2019-0803?
CVE-2019-0803 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-2019-0803?
CVE-2019-0803 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-2019-0803?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-0803, 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-2019-0803

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