CVE-2020-1464

Windows Spoofing Vulnerability

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.

Affected

Microsoft · Windows 10 Version 1803 · Windows 10 Version 1809 · Windows Server 2019 · Windows Server 2019 (Server Core installation) · Windows 10 Version 1909 · Windows Server, version 1909 (Server Core installation)

CVSS v3.1 NVD

5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 MICROSOFT

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

2.1 LOWAV:L/AC:L/Au:N/C:N/I:P/A:N

EPSS

38.95% chance of exploitation in the next 30 days, 99th percentile

CISA KEV

added 2021-11-03

Published

2020-08-17

Updated

2025-10-21

Proof-of-concept exploits (1)

• https://medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd

Security advisories

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

References

• CVE Record
• NVD entry