Microsoft Windows AppX Deployment Extensions Privilege Escalation Vulnerability

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

Technical Severity

CVSS v3.1 Metrics

HIGH

7.8 / 10

Minimal Risk Critical

Vector Specification

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

Exploitation Likelihood

EPSS Prediction

0.49 %

Predictive Probability

Percentile Rank

65.5 th

Documented as more likely to be exploited than 65.5% of known CVEs.

Detection Date

May 23, 2022

Remediation Due

Jun 13, 2022

CISA Catalog Active

Threat Analysis

A privilege escalation vulnerability exists when the Windows AppX Deployment Extensions improperly performs privilege management, resulting in access to system files.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2019-1385