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: 39%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
39%
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 104× in last 7d / 419× 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 1,500 total refreshes for this CVE.

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

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.

Dependency Blast Radius

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