CVE-2019-0841

KEVRansomware UseMicrosoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability

Description

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.

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.

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

PublishedApr 9, 2019

Last modifiedJun 17, 2026

Added to KEVMar 15, 2022

Remediation dueApr 5, 2022

References

packetstormsecurity.com/files/152463/Microsoft-Windows-AppX-Deployment-Service-Privilege-Escalation.htmlThird Party AdvisoryVDB Entry
packetstormsecurity.com/files/153009/Internet-Explorer-JavaScript-Privilege-Escalation.htmlThird Party AdvisoryVDB Entry
packetstormsecurity.com/files/153114/Microsoft-Windows-AppX-Deployment-Service-Local-Privilege-Escalation.htmlThird Party AdvisoryVDB Entry
packetstormsecurity.com/files/153215/Microsoft-Windows-AppX-Deployment-Service-Local-Privilege-Escalation.htmlThird Party AdvisoryVDB Entry
packetstormsecurity.com/files/153642/AppXSvc-Hard-Link-Privilege-Escalation.htmlExploitThird Party Advisory
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0841PatchVendor Advisory
exploit-db.com/exploits/46683/ExploitThird Party Advisory
zerodayinitiative.com/advisories/ZDI-19-360/Third Party AdvisoryVDB Entry
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-0841US Government Resource

0 recent articles mention this CVE

Risk assessment · Critical

Actively exploited and used by ransomware crews. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 1665 days
Ransomware: Used in known ransomware campaigns
CVSS: 7.8 HIGH
EPSS (30-day exploit probability): 41.4% · top 1% of all CVEs
Weakness: CWE-59

Recommended actions

1.Apply updates per vendor instructions.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
4.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.