known ransomware use

Microsoft Windows AppX Deployment Service Privilege Escalation Vulnerability

Added to KEV
2022-05-23
Federal due date
2022-06-13
Vendor
Microsoft
Product
Windows
EPSS
83.8th percentile (score 0.019, as of 2026-06-08)
NVD CVSS v3.1
Ransomware use
Known
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2019-1130

CISA short description

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

Required action

Apply updates per vendor instructions.

EPSS percentile is the FIRST.org exploit-probability ranking as of the date noted above; it moves daily. CVSS reflects NVD's analysis at time of publication.