CVE-2019-1130
Published: May 23, 2022
Official Description
A privilege escalation vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links.
CISA KEV Advisory
Microsoft Windows AppX Deployment Service Privilege Escalation Vulnerability
A privilege escalation vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in Windows AppX Deployment Service (AppXSVC) allows an attacker to elevate their privileges on an affected system by improperly handling hard links. While a CVSS score is not provided, its inclusion in CISA's KEV catalog and active exploitation in the wild indicate its critical nature. The EPSS score of 0.01925 suggests a low but present likelihood of exploitation.
Active exploitation of this vulnerability has been observed in the wild, as confirmed by its presence in CISA's KEV catalog. This indicates that attackers are actively leveraging this flaw.
Apply the latest security updates from Microsoft to address the improper handling of hard links in the AppX Deployment Service. Ensure all Windows systems are regularly patched to prevent privilege escalation.
Technical Analysis
CVE-2019-1130 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2019-1130 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-1130 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1