CVE-2021-43890

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Summary

CVECVE-2021-43890
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-12-15 15:15:00 UTC
Updated2023-12-30 07:15:00 UTC
DescriptionWindows AppX Installer Spoofing Vulnerability

Risk And Classification

EPSS: 0.102950000 probability, percentile 0.952090000 (date 2026-07-22)

CISA KEV: Listed on 2021-12-15; due 2021-12-29; ransomware use Known

Problem Types: NVD-CWE-noinfo

CISA Known Exploited Vulnerability

VendorMicrosoft
ProductWindows
NameMicrosoft Windows AppX Installer Spoofing Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://nvd.nist.gov/vuln/detail/CVE-2021-43890

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Microsoft App Installer All All All All
Operating System Microsoft Windows 10 - All All All
Operating System Microsoft Windows 10 - All All All

References

ReferenceSourceLinkTags
Security Update Guide - Microsoft Security Response Center MISC portal.msrc.microsoft.com
Microsoft disables MSIX protocol handler abused in malware attacks www.bleepingcomputer.com
Microsoft Disables MSIX App Installer Protocol Widely Used in Malware Attacks thehackernews.com
Added Winget Check and Install by mrhaydendp · Pull Request #26 · ChrisTitusTech/winutil · GitHub github.com
Financially motivated threat actors misusing App Installer | Microsoft Security Blog www.microsoft.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Legacy QID Mappings

  • 91848 Windows AppX Installer Spoofing Vulnerability

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