CVE-2020-1027

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 2022-05-23), 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: 4%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 the way that the Windows Kernel handles objects in memory, aka 'Windows Kernel Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0913, CVE-2020-1000, CVE-2020-1003.

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
90.4%
KEV
⚠ Exploited

Published

April 15, 2020

Last Modified

October 29, 2025

Advisory Details (3)

Auto-updated Jun 4, 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-2020-1027
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-2020-1027
generic

Packet Storm

http://packetstormsecurity.com/files/168068/Windows-sxs-CNodeFactory-XMLParser_Element_doc_assembly_assemblyIdentity-Heap-Buffer-Overflow.html

Weakness Classification(2)

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 95× in last 7d / 423× 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 772 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2020-1027?
CVE-2020-1027 is a high vulnerability published on April 15, 2020. An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects in memory, aka 'Windows Kernel Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0913, CVE-2020-1000, CVE-2020-1003.
When was CVE-2020-1027 disclosed?
CVE-2020-1027 was first published in the National Vulnerability Database on April 15, 2020, 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-2020-1027 actively exploited?
Yes. CISA added CVE-2020-1027 to the Known Exploited Vulnerabilities catalog on May 23, 2022, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-1027?
CVE-2020-1027 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-2020-1027?
CVE-2020-1027 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-2020-1027?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-1027, 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.

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