CVE-2020-1464

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 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
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 top5pctExposed: 0

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

A spoofing vulnerability exists when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and load improperly signed files. In an attack scenario, an attacker could bypass security features intended to prevent improperly signed files from being loaded. The update addresses the vulnerability by correcting how Windows validates file signatures.

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

August 17, 2020

Last Modified

February 23, 2026

Advisory Details (4)

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-2020-1464
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-2020-1464
generic🔴 Active Exploitation

Microsoft Put Off Fixing Zero Day for 2 Years – Krebs on Security

https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/
generic

Distribution of malicious JAR appended to MSI files signed by third parties ~ VirusTotal Blog

https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html

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 67× in last 7d / 384× 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 765 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2020-1464?
CVE-2020-1464 is a critical vulnerability published on August 17, 2020. A spoofing vulnerability exists when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and load improperly signed files. In an attack scenario, an attacker could bypass security features intended to prevent…
When was CVE-2020-1464 disclosed?
CVE-2020-1464 was first published in the National Vulnerability Database on August 17, 2020, with the most recent update on February 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-1464 actively exploited?
Yes. CISA added CVE-2020-1464 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-1464?
CVE-2020-1464 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-2020-1464?
CVE-2020-1464 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-2020-1464?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-1464, 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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