Home / Vulnerabilities / CVE-2021-43890
HIGH SEVERITY Ransomware Linked
CVE-2021-43890 Microsoft · Windows

Microsoft Windows AppX Installer Spoofing Vulnerability

Critical Threat Advisory: This vulnerability is documented in active Ransomware campaigns. Immediate remediation required.

Technical Severity

CVSS v3.1 Metrics

HIGH
7.1 / 10
Minimal Risk Critical
Vector Specification
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Exploitation Likelihood

EPSS Prediction

19.01 %
Predictive Probability
Percentile Rank
95.1 th

Documented as more likely to be exploited than 95.1% of known CVEs.

Detection Date

Dec 15, 2021

Remediation Due

Dec 29, 2021

CISA Catalog Active

Threat Analysis

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

Remediation Directive

Apply updates per vendor instructions.

External Intelligence

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2021-43890