# CVE-2020-1464: Windows Spoofing Vulnerability

> CVE-2020-1464: Windows Spoofing Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2020-1464
Last updated: 2025-10-21T23:35:37Z

- Published: 2020-08-17 19:13 UTC · Updated: 2025-10-21 23:35 UTC · Assigner: microsoft
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
- EPSS: 38.9%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2021-11-03, federal due date 2022-05-03, ransomware use: Unknown

## Description

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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Microsoft: Windows 10 Version 1507
- Microsoft: Windows 10 Version 1607
- Microsoft: Windows 10 Version 1709
- Microsoft: Windows 10 Version 1709 for 32-bit Systems
- Microsoft: Windows 10 Version 1803
- Microsoft: Windows 10 Version 1809
- Microsoft: Windows 10 Version 1903 for 32-bit Systems
- Microsoft: Windows 10 Version 1903 for ARM64-based Systems
- Microsoft: Windows 10 Version 1903 for x64-based Systems
- Microsoft: Windows 10 Version 1909
- Microsoft: Windows 10 Version 2004
- Microsoft: Windows 7
- Microsoft: Windows 7 Service Pack 1
- Microsoft: Windows 8.1
- Microsoft: Windows Server 2008 R2 Service Pack 1
- Microsoft: Windows Server 2008 R2 Service Pack 1 (Server Core installation)
- Microsoft: Windows Server 2008 Service Pack 2
- Microsoft: Windows Server 2008  Service Pack 2
- Microsoft: Windows Server 2008 Service Pack 2 (Server Core installation)
- Microsoft: Windows Server 2012
- Microsoft: Windows Server 2012 R2
- Microsoft: Windows Server 2012 R2 (Server Core installation)
- Microsoft: Windows Server 2012 (Server Core installation)
- Microsoft: Windows Server 2016
- Microsoft: Windows Server 2016 (Server Core installation)
- Microsoft: Windows Server 2019
- Microsoft: Windows Server 2019 (Server Core installation)
- Microsoft: Windows Server, version 1903 (Server Core installation)
- Microsoft: Windows Server, version 1909 (Server Core installation)
- Microsoft: Windows Server version 2004

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-1464)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2020-1464)
- [https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html](https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html)
- [https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/](https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/)
- [https://medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd](https://medium.com/%2540TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd)
- [https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464](https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2020-1464 · Markdown: https://rewindex.com/cve/CVE-2020-1464.md · JSON: https://rewindex.com/api/v1/cves/CVE-2020-1464 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:50:06.071Z