CVE-2019-1064
7.8, high Known exploited Used in ransomwareMicrosoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability
- CVSS
- 7.8, high high CVSS v3.1
- EPSS, next 30 days
- 7% higher than 93.9% of scored CVEs
- Exploitation
- Confirmed in the wild
- Published
- 12 Jun 20197 years ago
Known exploited
CISA added this to the Known Exploited Vulnerabilities Catalog on 15 Mar 2022 and links it to ransomware activity. US federal agencies had to remediate by 5 Apr 2022, a deadline that has passed.
Required action. Apply updates per vendor instructions.
Description
An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The security update addresses the vulnerability by correcting how Windows AppX Deployment Service handles hard links.
Details
- Vendor
- Microsoft
- Product
- Windows 10 Version 1703
- Weakness
- CWE-59 (opens in a new tab)
- Status
- Analyzed
- Updated
- 17 Jun 2026
- Assigner
- secure@microsoft.com
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References 3
Patches and fixes 2
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Other Microsoft CVEs
Every Microsoft CVE we holdSame vendor in what we hold, not a known link between the flaws.
- CVE-2026-96951 Microsoft Windows Command Injection Vulnerability KEV EPSS 2% 8.8, high
- CVE-2026-81963 Microsoft Windows Link Following Vulnerability KEV EPSS 0.4% 7.8, high
- CVE-2026-85880 Microsoft Windows Heap-Based Buffer Overflow Vulnerability KEV EPSS 4% 7.8, high
- CVE-2026-65660 Microsoft SharePoint Code Injection Vulnerability KEV EPSS 2% 8.8, high
- CVE-2026-68820 Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability KEV EPSS 0.3% 7, high
- CVE-2026-50522 Microsoft SharePoint Deserialization of Untrusted Data Vulnerability KEV EPSS 3% 9.8, critical
- CVE-2026-56155 Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability KEV EPSS 0.3% 7.8, high
- CVE-2026-56164 Microsoft SharePoint Server Missing Authentication for Critical Function Vulnerability KEV EPSS 1% 9.8, critical
Beyond this page
Is CVE-2019-1064 in your network?
This page tells you how dangerous CVE-2019-1064 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
CVE-2019-1064 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.
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Find it before attackers do
Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2019-1064 comes with the devices to patch.
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EXYS7950 KONDRA
Detect it if it's exploited
Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
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Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.