CASCACascade Atlas

Evidence dossier

CVE-2020-1464

Windows Spoofing Vulnerability

58.1–87.3Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
Aug 17, 2020
Updated
Oct 21, 2025
Evidence coverage
72%
CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS41.13%

2026-07-18 · v2026.06.15 · percentile 98.5%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

microsoftoriginal assertion
container

Windows Spoofing Vulnerability

CISA KEVoriginal assertion
observed_exploitation

Microsoft Windows Spoofing Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.411310000000; percentile 0.985110000000

Applicability

Cited product scope

Trace impact →
MicrosoftWindows 10 Version 1507
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1607
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1709
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1709 for 32-bit Systems
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1803
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1809
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1903 for 32-bit Systems
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1903 for ARM64-based Systems
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1903 for x64-based Systems
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 1909
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 10 Version 2004
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 7
[{"status": "affected", "version": "6.1.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 7 Service Pack 1
[{"status": "affected", "version": "6.1.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows 8.1
[{"status": "affected", "version": "6.3.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2008 R2 Service Pack 1
[{"status": "affected", "version": "6.1.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)
[{"status": "affected", "version": "6.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2008 Service Pack 2
[{"status": "affected", "version": "6.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2008 Service Pack 2
[{"status": "affected", "version": "6.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)
[{"status": "affected", "version": "6.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2012
[{"status": "affected", "version": "6.2.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2012 R2
[{"status": "affected", "version": "6.3.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2012 R2 (Server Core installation)
[{"status": "affected", "version": "6.3.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2012 (Server Core installation)
[{"status": "affected", "version": "6.2.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2016
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2016 (Server Core installation)
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2019
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server 2019 (Server Core installation)
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server, version 1903 (Server Core installation)
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server, version 1909 (Server Core installation)
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
MicrosoftWindows Server version 2004
[{"status": "affected", "version": "10.0.0", "lessThan": "publication", "versionType": "custom"}]unknown
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_2004:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_1903:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_1909:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2004:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*supported

Assessments

CVSS by origin

2.1
nvd@nist.govCVSS 2.0 · role PrimaryAV:L/AC:L/Au:N/C:N/I:P/A:N
5.5
nvd@nist.govCVSS 3.1 · role SecondaryCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
7.8
secure@microsoft.comCVSS 3.1 · role SecondaryCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8
microsoftCVSS 3.1 · role unknownCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.