CISA KEVRansomware Use Known

CVE-2021-43890

Microsoft Windows AppX Installer Spoofing Vulnerability

Microsoft Windows AppX Installer contains a spoofing vulnerability which has a high impacts to confidentiality, integrity, and availability.

VendorMicrosoft

ProductWindows

EPSS10.3%

Added to KEVDec 15, 2021

Remediation DueDec 29, 2021

Known Ransomware UseYes

Required Action

Apply updates per vendor instructions.

From Disclosure to Action

Know how quickly you need to move.

For CVE-2021-43890, added to the catalogue on Dec 15, 2021 with a remediation deadline of Dec 29, 2021.

Added to KEVDec 15, 2021

Seraph AlertSame day

Remediation DueDec 29, 2021

ValidationOngoing

Overdue1764 days overdue

Recommended action: Apply vendor remediation guidance.

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