CVE-2020-1464: Microsoft Windows Spoofing Vulnerability

CISA Known Exploited Vulnerabilities

Name

Microsoft Windows Spoofing Vulnerability

Vendor

Microsoft

Product

Windows

Added to the catalog

2021-11-03

Due date for US federal agencies

2022-05-03

Weaknesses

CWE-347

Catalog version

2026.10.30

Microsoft Windows contains a spoofing vulnerability when Windows incorrectly validates file signatures, allowing an attacker to bypass security features and load improperly signed files.

Required action (CISA)

Apply updates per vendor instructions.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

• https://nvd.nist.gov/vuln/detail/CVE-2020-1464

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status

Analyzed

Published

2020-08-17T19:15:14.867

Last modified

2026-06-17T03:01:28.433

Weaknesses

CWE-347

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.

References

• https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html (Third Party Advisory)
• https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/ (Issue Tracking, Third Party Advisory)
• https://medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd (Exploit, Third Party Advisory)
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464 (Patch, Vendor Advisory)
• https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html (Third Party Advisory)
• https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/ (Issue Tracking, Third Party Advisory)
• https://medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd (Exploit, Third Party Advisory)
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464 (Patch, Vendor Advisory)
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1464 (US Government Resource)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:41:51.476Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2020-1464

CVE record

Title (CNA)

Windows Spoofing Vulnerability

Assigner

microsoft

State

PUBLISHED

Published

2020-08-17T19:13:03.000Z

Updated

2025-10-21T23:35:37.819Z

Problem types

Spoofing

References

• https://medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd
• https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464
• https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html

Read on 2026-11-03T01:03:29.135Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2020/1xxx/CVE-2020-1464.json

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

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