Microsoft Windows AppX Deployment Service Privilege Escalation Vulnerability

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

Technical Severity

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

1.93 %

Predictive Probability

Percentile Rank

83.0 th

Documented as more likely to be exploited than 83.0% of known CVEs.

Detection Date

May 23, 2022

Remediation Due

Jun 13, 2022

CISA Catalog Active

Threat Analysis

A privilege escalation vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links.

Apply updates per vendor instructions.

Vendor Identity

Microsoft

Affected Product

Windows

Ransomware Status

Campaign Use Known

Weakness Classification

CWE-59

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2019-1130