OnlyFm252
Microsoft Windows

CVE-2020-1464 — Windows Spoofing Vulnerability

Important CVSS 7.8 EPSS 0.41131 ⚠️ Exploited in the wild 📢 Publicly disclosed 2020-08 archive

Executive Summary

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.

Overview

7.8
CVSS HIGH
Important
MS Severity
Exploited
MS Exploit Status
Exploitation Detected
MS Exploit Likelihood
Category Spoofing
Released Aug 11 2020
Last Updated Aug 11 2020
Publicly Disclosed Yes
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.41131 — 0.98484 percentile
NVD CVSS 7.8 HIGH — differs from MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
Low
INTEGRITY
Low
AVAILABILITY
Low
EXPLOIT CODE MATURITY
High
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.1

EPSS Score

0.41131
probability of exploitation in the next 30 days
0.98484 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

30 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 4571692 (Security Update) Important Spoofing Yes
Windows 10 for x64-based Systems 4571692 (Security Update) Important Spoofing Yes
Windows 10 Version 1607 for 32-bit Systems 4571694 (Security Update) Important Spoofing Yes
Windows 10 Version 1607 for x64-based Systems 4571694 (Security Update) Important Spoofing Yes
Windows 10 Version 1709 for 32-bit Systems 4571741 (Security Update) Important Spoofing Yes
Windows 10 Version 1709 for ARM64-based Systems 4571741 (Security Update) Important Spoofing Yes
Windows 10 Version 1709 for x64-based Systems 4571741 (Security Update) Important Spoofing Yes
Windows 10 Version 1803 for 32-bit Systems 4571709 (Security Update) Important Spoofing Yes
Windows 10 Version 1803 for ARM64-based Systems 4571709 (Security Update) Important Spoofing Yes
Windows 10 Version 1803 for x64-based Systems 4571709 (Security Update) Important Spoofing Yes
Windows 10 Version 1809 for 32-bit Systems 4565349 (Security Update) Important Spoofing Yes
Windows 10 Version 1809 for ARM64-based Systems 4565349 (Security Update) Important Spoofing Yes
Windows 10 Version 1809 for x64-based Systems 4565349 (Security Update) Important Spoofing Yes
Windows 10 Version 1903 for 32-bit Systems 4565351 (Security Update) Important Spoofing Yes
Windows 10 Version 1903 for ARM64-based Systems 4565351 (Security Update) Important Spoofing Yes
Windows 10 Version 1903 for x64-based Systems 4565351 (Security Update) Important Spoofing Yes
Windows 10 Version 1909 for 32-bit Systems 4565351 (Security Update) Important Spoofing Yes
Windows 10 Version 1909 for ARM64-based Systems 4565351 (Security Update) Important Spoofing Yes
Windows 10 Version 1909 for x64-based Systems 4565351 (Security Update) Important Spoofing Yes
Windows 10 Version 2004 for 32-bit Systems 4566782 (Security Update) Important Spoofing Yes
Windows 10 Version 2004 for ARM64-based Systems 4566782 (Security Update) Important Spoofing Yes
Windows 10 Version 2004 for x64-based Systems 4566782 (Security Update) Important Spoofing Yes
Windows 7 for 32-bit Systems Service Pack 1 4571729 (Monthly Rollup) 4571719 (Security Only) Important Spoofing 4565524 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571729 4571719 Windows 7 for x64-based Systems Service Pack 1 4571729 (Monthly Rollup) 4571719 (Security Only) Important Spoofing 4565524 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571729 4571719 Windows 8.1 for 32-bit systems 4571703 (Monthly Rollup) 4571723 (Security Only) Important Spoofing 4565541 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571703 4571723 Windows 8.1 for x64-based systems 4571703 (Monthly Rollup) 4571723 (Security Only) Important Spoofing 4565541 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571703 4571723 Windows RT 8.1 4571703 (Monthly Rollup) Important Spoofing Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 4571730 (Monthly Rollup) 4571746 (Security Only) Important Spoofing 4565536 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571730 4571746 Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 4571730 (Monthly Rollup) 4571746 (Security Only) Important Spoofing 4565536 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571730 4571746 Windows Server 2008 for x64-based Systems Service Pack 2 4571730 (Monthly Rollup) 4571746 (Security Only) Important Spoofing 4565536 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571730 4571746 Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 4571730 (Monthly Rollup) 4571746 (Security Only) Important Spoofing 4565536 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571730 4571746 Windows Server 2008 R2 for x64-based Systems Service Pack 1 4571729 (Monthly Rollup) 4571719 (Security Only) Important Spoofing 4565524 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571729 4571719 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4571729 (Monthly Rollup) 4571719 (Security Only) Important Spoofing 4565524 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571729 4571719 Windows Server 2012 4571736 (Monthly Rollup) 4571702 (Security Only) Important Spoofing 4565537 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571736 4571702 Windows Server 2012 (Server Core installation) 4571736 (Monthly Rollup) 4571702 (Security Only) Important Spoofing 4565537 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571736 4571702 Windows Server 2012 R2 4571703 (Monthly Rollup) 4571723 (Security Only) Important Spoofing 4565541 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571703 4571723 Windows Server 2012 R2 (Server Core installation) 4571703 (Monthly Rollup) 4571723 (Security Only) Important Spoofing 4565541 Base: 5.3 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C Yes 4571703 4571723 Windows Server 2016 4571694 (Security Update) Important Spoofing Yes
Windows Server 2016 (Server Core installation) 4571694 (Security Update) Important Spoofing Yes
Windows Server 2019 4565349 (Security Update) Important Spoofing Yes
Windows Server 2019 (Server Core installation) 4565349 (Security Update) Important Spoofing Yes
Windows Server, version 1903 (Server Core installation) 4565351 (Security Update) Important Spoofing Yes
Windows Server, version 1909 (Server Core installation) 4565351 (Security Update) Important Spoofing Yes
Windows Server, version 2004 (Server Core installation) 4566782 (Security Update) Important Spoofing Yes

Patches

8 patches
Article Type Restart
4571692 Security Update Yes
4571694 Security Update Yes
4571741 Security Update Yes
4571709 Security Update Yes
4565349 Security Update Yes
4565351 Security Update Yes
4566782 Security Update Yes
4571703 Monthly Rollup Yes

Known Exploits

Acknowledgments

None

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