cyfenced.com →

[ CVE-2019-0841 · Published 9 Apr 2019 ]

Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability

Exploited · CISA KEV CVSS 7.8 EPSS 41%Fix available

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-03-15
  • Known to be used in ransomware campaigns
  • EPSS: 41% chance of exploitation in the next 30 days (higher than 99% of CVEs)

[ Description ]Official description

An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-0730, CVE-2019-0731, CVE-2019-0796, CVE-2019-0805, CVE-2019-0836.

CISA: A privilege escalation vulnerability exists when Windows AppXSVC improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 5 Apr 2022): Apply updates per vendor instructions.

[ References ]References